I shouldn't despair too much just yet. I understand that in the last 2/3 weeks before the race, quite a few places come up for grabs due to injury etc. The Organisers I believe allow swopping of numbers (with notice) - You (and I) will just have to take a chance on leaving it to the wire!!
Same advice as I gave to Borders - just keep an eye on the various Forum topics in the run up to the race. I am sure you will end up sorted. Good luck!