My first post was just images I collected from around these forums...I've actually deleted most of those now because of their poor quality.
I then found various artist including Unusualsuspex and Fractualsponge who show off their 3D models with multi-perspective screens.
Most recently I figured out how to change the camera angle in one of my favorite games, Star Wars: Empire at War, as well as how to turn off shadows in Sins of a Solar Empire. The former has hundreds of mods, and the latter has three notable SW mods, so there are potentially thousands of ship images I can get. I use FRAPS to get clean screenshots and windows paint to orient, quick-crop (as seen above,) and convert to PNG. Finally, I use the manual cropping tool in GIMP to get the ship by itself. It takes about 10-15 min total per large ship since I like keeping a lot of detail, so it's extremely labor intensive.
If anyone has a bunch of free time and feels like cropping a crap ton of ships, let me know.
...but to actually answer your question, WH40K ships are hard to get. I know there are a couple mods out there for space RTS's that you could try. Otherwise I'm sure Mensrea/Japhet would be ok with you using their ships as long as you gave them credit.
< Message edited by Capshades -- 6/17/2015 1:35:07 AM >