Hi SoreFeet-
Do you know someone from whom you could borrow a longer seatpost to see if that can resolve the issue without having to spend more cash? The frame would survive a UPS/USPS trip as long as you used a plastic or wooden spacer in the dropouts and forks and PLENTY of padding and sturdy boxes. At the same time, if you're going to use it as a fixie and could potentially make it work with a new seatpost...that might be just the ticket. Don't give up hope yet.
~ Blue Jays ~