With all the ICD guys lurking around here, there should be no problem getting your BKO to work by thanksgiving. We have all probably had a problem ICD gun.
Where is it leaking from specifically? Down the barrel? From the LPR?
Sending your marker to paintballtrader.com (aka vaporworks) is not a very good bet. His service can be spotty. The site is down sometimes, and as you have seen, he is not very good about returning emails.
Finally, you can probably get the fastest answers to your questions at ICDO. Some of the dudes over there don't come over here much, but are online many times a day over there.