I've seen at least a dozen coffins available here and at other sites. I'd recommend checking in FreeStuff. If you don't find anything there, or in the MarketPlace, I know the Horror section at 3D Cafe has several styles in various 3D formats. Convert one to OBJ (if you con't have any other software that will do it, you can import many formats into Poser, and then export again as OBJ. Once you've got one in OBJ format, you can run it thru UVMapper (Classic version is still a free download), and make a texture template for it. Save it out of UVMapper, re-import it into Poser, and then you can make and apply a bump map to incise any lettering you want into the surface. Cheers!