Restore 6700 to stock ROM for exchange

I need some help. I have a 6700 that won't connect via usb anymore and I need to get it restored to stock ROM as I have received a Touch Pro to replace it.

Can anyone tell me how to find and install the OEM ROM via memory card? (If it is possible, that is.)
All I seem to be able to find is the custom ROMs, which are great, btw, as I have been running one for quite awhile.

Thanks in advance for any help on this.