Thank you Chimpanzee (Your avatar) . Sadly i'll have to spread some rep before giving you again.
Wondering why a Chimpanzee like you love to fix the Rifleman's gun (LOL)
Ok, thank you again, and beware for guns, they work now
Well, seeing your project is looking very good so far I would be willing to create a custom rock model for you. The Rock(s) would come with 3-5 variations having 1 custom texture.
I think the custom texture can range from a square 128 to a square 512, depending on how much room you have for an import and how much qualitiy you want to have within the texture. However I guess 128 or 256 would be fitting perfectly.
Each model would take a filesize of ~6-10 kb, the texture would take up between 40-140 kb depending on converting prodecure settings.
Do you want me to create such a set of rocks for you?