As I mentioned previously, I don't see why a fundraising effort couldn't be initiated to construct a suitable shed for 607. There's plenty of space in the WAVE on the other side of the A15, and it would make a great exhibition and visitor centre too (and be much less grubby than the old portacabin that they have on the car park at present!).
On the basis of earlier projects, I would imagine that the Lottery people would be happy to stump-up at least half of the cost, so all it needs is someone in the right place to actually do it. Look the the people at Bruntingthorpe who have succesfully set-about reconstructing Wattisham's QRA sheds there through their own fundraising efforts...
Perhaps the former Vulcan people on Pprune could approach Waddington's Station Commander and point-out what a shameful situation this is, and suggest that we start trying to raise some cash, before 607 ends-up like the one at Blackpool.