I guess most already know this, but Steel Panthers: WaW has tons of pictures(tanks, aircraft, infantry etc). I don't know if this was already the main source for them, but I never heard it mentioned, so.... 
The is free but a huge download(400+ megs). Ah, so what, I just found it last weeko
The is free but a huge download(400+ megs). Ah, so what, I just found it last week
o