Commissions.
On DeviantArt.com you can get in touch with an artist, you ask for an artwork, you both negotiate a price, the artist makes the artwork, and you pay the artist.
Would any of you Physics altering, shapes substituting big shots be willing to undertake such a deal?
For example, I turn over a physics and shape file, and request that Ticks be replaced by M1A1 Wasps from M1A1 in both appearance and behavior. Or I request a texture animation loop, I turn over the textures and you make it animate through the frames in gameplay.
I pay a fee via PayPal proportional to the service provided.
Anyone interested?