You're welcome Dale. You probably already know, but the airfields used in the BoB movie where actual BoB airfileds. The main one was Duxford, which also doubled for a couple of others, including the 'Hurricanes in France' scenes, where the '109s strafe the field, and was also used for some of the Luftwaffe fighter scenes (those shot in the UK). Duxford later became 'home' to the 78th FG, and is now a fantastic museum and active field.
Stuka kits in 1/48th - I've juts got the Revell (ex Hasegawa) kit, which is excellent. The types used were the Ju87B-1 and B-2, and available kits of this type (all B-2 or R-2, but easily modified) are:
Airfix - first released around 1979, and basically a 'scaled down' version of their superb 1/24th scale kit. Still good, but perhaps lacks the finesse of more current offerings.
Hasegawa - excellent, but pricey. (see Revell).
Italeri - a good kit, lots of detail and PE parts, includes an engine etc. Apparently a few fit issues and, unless you want to display the engine, and fit PE parts which probably won't be seen, then it's a bit expensive compared to Airfix and Revell.
Revell - this is the Hasegawa kit, at around half the price! Very nice detail, nicely moulded, and about 30% or more less than the Italeri kit. Only downside is the typical RG instruction sheet (not a major problem) and the irritating, end-opening box!
Price wise, from low to high, it's Airfix, Revell, Italeri, Hasegawa.
My choice? Revell, followed by Airfix.
If you need any re the StG and their codes and badges, just shout - I'm currently in the research and planning stages of replacing my BoB collection, concentrating mainly on the 'Hardest Day', 18th August.
If you're going for the whole collection, then the problem areas will be the Defiant on the RAF side, and the Ju88 and Do17 on the Luftwaffe side. I converted a Hobbycraft Ju88A-4 into a BoB period A-5 of KG30, moulding my own rear canopy section, and I'm waiting for a Hobbycraft Do17Z to arrive from the 'States. This will need a little modification to obtain the correct shape, using the Falcon vac-form set, and some scratch work.
If you want to add the Ju88, then the HC kit is reasonable, and conversion fairly simple, otherwise, the Revell A-4, converted to A-5 or, if you feel really mad, converted to A-1 !!
If you want the Dornier too, then it's a case of checking e-bay regularly, or those places which stock and sell out of production kits. Hobbycraft are back in business, but the Dornier kits, in all three versions, are not yet listed.
Hope this helps.
EDIT: crossing posts with Steve. There were Ju87B-1s in the Stg. For example, Werke Nr.5167, code S2+UN (red 'N') of 5/Stg.77. This force landed on Ham Manor golf course, with both pilot and gunner wounded, after attacking Ford airfield on 18th August.
Outwardly there is little difference, and the kits can easily be modified.
Differences were:-
1) The B-2 had the broader chord, wooden prop, as supplied in the kits.
2) The B-1 did not have radiator gills, and the radiator itself was slightly shallower, with a slightly more pronounced upward curve to the lower cowl, in front of the rad. The latter two points are not really noticeable in 1/48th scale, and the engraving for the gills can be filled.
3) The B-1 had an open access hatch for the starter crank, on the lower, port cowling, whereas the B-2 had an access hatch cover.
There were a few other minor things, outwardly, but not really seen, or worth bothering with, in this scale.
Note that by this time, the siren and it's 'prop', on the port u/c fairing, had been deleted, and a domed fairing fitted. This is confirmed by photo evidence, and surviving crew accounts. The ,ain reason was to save weight, drag, and performance.
So main job with the kits is either replace the prop with a suitable item from the spares box (can't find any aftermarket items), or, as I will, re-shape the kit prop, if you want a B-1.
I'll be doing the one mentioned above!