I'm sure some of the big teams would be happy to donate a day at a BSB... they often give that for charity auctions etc. Whoever are the major sponsors of the TT... Pokerstars or whoever, could be asked to put something up... all comes out of their marketing/advertising budget.
At TT time we did have daily draws for things like jackets, etc and I think IOMSPC put up sailings too, but the MGP didn't get anything like that. Maybe the TTMA needs to work with the DTL to spread the donations, and to increase the number.
One of the things lacking is a substantial benefit to local marshals and one or two have mentioned it in conversation. Why can't we also have a discount at IOMSPC... so we can go across and come back... just cos we live here doesn't mean we haven't made sacrifices, and we do occasionally venture out into the scary world on the other side!