Maybe PM moho008? I think he lives in Texas, he might be able to do it for you. Or you could back up all your files, xboxdash.xbe, audio folder, everything to your pc, then risk doing it yourself, if it doesn't work, you can get a replacement standard XBOX hdd from ebay cheap.
Or you should be able to get a pre-formatted and unlocked 120gb hdd from ebay, just search for xbox hard disc 120bg or something like that. Then just swap hdd's with the IDE cable. Easy.
Thanks man, nice to know that I'm awesome.
Check my MK poll forum again, some great pics I did on there. You might even be interested in buying the Scorpion XBOX when it's done.