It may depend on what you want done to it. Santa Fe Stoneworks sells Spyders they have modified with fancier handle materials. I don't know if they take outside orders or not. If you want something like a blade reprofile or switching a clip configuration...I'm not sure. STR, a member of this forum, has done mods to Spydercos before. Check out threads he's started in the Spyderco section.