what kinda thing are you after? Ive various fonts i use for reg lettering and one or two flag sheets (a lot of aircraft seem to have a flag after the reg number) but other than that ive not found much else...

heres a handy font site i use now and then....

http://www.webpagepublicity.com/free-fonts-f2.html

I get a lot of fonts from here or similar, once ive discoverd what font i need (thats usualy the tricky bit) and as some are only commercialy available for £££ sometimes you can find ones 'as close as' on sites such as this

i use this for reference mainly...

http://www.planespotters.net/Airline/Orion-Airways

And my favorite resource is of course, airliners.net

Theres  couple of sites out there with sick bags and timetables on, ill post them if i can relocate them, good for older liverys and lettering stlyes

Ah i see. If youve found the military ones i think thats all you will need. If the paintkit is anywhere near decent, all these sort of things should be already there.

Or simply cut and paste from photographs, especialy the 'CUT HERE' (like a red box with only the corners in red, with emergency somthing or other stamped inside ) boxes often seen on airliners - they are so tiny on the paint you wont tell the difference! You can hand make them quite easy also. Youd be hard pressed to spot them on some photos, mind.

Brtish airways are a good one to look at for those, they often stand out.

Engine markings, no step and so on should really be in the paintkit!