Actually there are a few. My first was Fujimi's offering in 1:76 with support crew and munitions. In 1:72 we have:
Airfix - with wheel bogies (anhänger) - double wheeled front and rear - and SdKfz 11 tow vehicle;
Hasegawa - 2 versions: Flak 18 with single wheel front and double wheeled rear anhänger, plus support crew, loose rounds and ammo boxes, and Flak 36 with anhänger but no figures or munitions);
Italeri - can't remember what accessories, apart from anhänger - don't recall which;
...and the creme de la creme: my latest purchase as of today, and by all accounts the best on the market - Revell's offering.
Won't post pics here as this is your thread, but check out the 'recent purchases' thread later on tonight...