Need help locating retailer

Hey there... pleasure to meet everyone, I've been modding the box for a couple years now and have enjoyed it quite immensely. Hopefully you can be of some assistance in my delima.

I have a few xboxes that have bad on board bioses. I can run the systems with my x3ce just fine, but when booting oem they immediately frag or just don't turn on. I have the oem bios, just need to locate either an enigmah or xtender (classic 29/11 wire) chip in order to restore my systems. Anyone who could PM me with some info would be most helpful. I'd be VERY appreciative. Thanks!