I used Kolari Vision for my conversion. They have a camera evaluation service where they will convert a camera for $49 (now $99) that they haven't converted before, and that's the route that I took.
http://www.kolarivision.com/?gclid=C...FSNyQgodWiUAJw
Digital Silver Imaging looks good too, but more expensive.
http://www.digitalsilverimaging.com/ir