Most people make their own. If you can start with the gun in full scale you should be able to make your own path around the gun in either of those programs.
I have seen some templates that look like they could have been provided by PE for designing their custom anodized geos/ego. You may also want to check out the inception forum. Simon may have the outlines for designing on guns that he has designed like the mini, axe, and vanquish.