Don't know if anyone else has dealt with this fellow on ebay, but I picked up a couple and have to say they're quite nice and easy to assemble.
Even works with USB to PS2 adapters. At least the USB Micro$oft mouse I have worked.
Seller goes by the handle of kevmeister2003.
If you know which end of a soldering iron to hold, this is a pretty easy project.
Good price too.
Only thing I could ding it for is not being enclosed!
http://www.ebay.com/itm/111172915508
