I did some working and did a halfed one for pyd's it basically combines it icon from python.exe with the DLL "gears" for windows DLL's beig under that. Hopefully it will work. (Anyone could use this as a base file and restyle it or whatever if they want. At least I tried.

(note: the file would have to go under the PC directory as well. Hopefully something from the python installer can associate them with pyd files so that way people can distinquish them from any other file type (like pdbs,lib,w/e with no icon(s)).