And as Dan Patterson says, you can rebuild the car yourself (well, I guess I'm not sure if this is rebuilding or getting one prebuilt. It makes a prj file, that's all I know):
prj = open(r"C:\junk\my_new_prj_file.prj", "w")
crs_string = 'PROJCS["NAD_1983_UTM_Zone_10N",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-123],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["Meter",1]]'
prj.write(crs_string)
prj.close()