Right Dan, I'm back, and fully compus mentus!
Here's some more profiles for G14's, K4's and late G6's; the latter look the same externally as the G14.
PICTURE 1: This is the JG77 one you have decals for, but a better profile. This machine apparently later became 'White 13', with the green and white RD bands. It is thought to have been shot down during Bodenplatte, when flown by Lt. Herbert Abendroth. (Image from 'Battle over the Reich, Dr. A. Price.)
PICTURE 2: Two late model G6's from JG300. You'll recognise 'Yellow 13' as the one I did from the 21st Century 1/32nd kit. The other is an ex-JG54 machine. If you alter the canopy on your kit, you could do this; I've got a small 'White 2', but you'd need the black 18. Or, cross kit with a G6, standard canopy and fin, and you could get another kite, shown in next pic.
PICTURE 3: An unusual G6 with 'Erla' canopy, from III/JG300. It's BARE METAL overall, where the paint was sanded off!
PICTURE 4: Upper surfaces and lower wing tips of 'Red 8'.
All previous three are from Eagle Cals decal sheet EC#88.
PICTURE 5: G14's from JG4, JG5 and KG(J)55. I've got a 'White 1, and a 'Black 4'; the latter if you wanted a representative A/C of JG5.
PICTURE 6; Another, rather ropey profile, of JG5, Norway 1945.
PICTURE 7: A G14 of JG2. I've got a 'Black 8', but not quite the right shape.
PICTURE 8 A rather poor B&W profile of a K4, believed to be from JG27 in April, 1945. I've got the colour details for this.
So, with your decals, a mix of yours and mine, or maybe some that Jan showed, you could find something.
I've also got some black 'Winkels' (see the decals I posted earlier.) I'm afraid the rest I have are 1/32nd, or have discoloured/cracked with age!
I've got a B&W pic of a JG27 G6 (normal canopy and fin) with black winkels, GruppenKommandeur A/C if that's any use, and I can 'make up' the winkels.
Over to you for choice time!!