This video will run you through the process of updating the firmware of your 9xr Radio including uploading your Model Data etc. I've also included part of a previous video that will run you though the tricky process of install the AVR Programmer Drivers
but I got mine from ebay only because I was in a hurry to do this mod.
The board I purchased was from ebay and if you search for item 300695243866 you should find the exact one I purchased. Having said that if you search USBASP USB ISP AVR Programmer etc you should find one.