It has been awhile since this post but I thought I would share some info.
Looks like Newegg.com has one on sale. It is OEM and some of those that have purchased it said it wasn't Revision B. Then there are some that say they got a rev b model and it does work for XGD3 full discs with Burner Max.
http://tinyurl.com/lbtujn
Purchase with your own discretion that it might not be compatible with Burner Max Flash if not rev. b.