18greens,
May I suggest that you contact your 'local' RAF base or ATC unit? I would hope that under the circumstances, the SWO or PRO at the base would let you 'borrow' the said item. Where are you located ?
As for the flypast...phew!
There is a contact at MOD who deals solely with these sort of things, and I suppose you should try there initially, however....
it may be worth a phone call to BBMF at Coningsby and ask them the question. If they can't help you directly, they will sure know the man (or woman) at MOD who can. Good Luck, I am sure 'the boys' will do all they can to help.
MOD Tel No: 020 7218 9000 (switchboard) Ask to speak to Wg Cdr Ned Kelly (head of RAF Communications) if anyone can, Ned can!
Best wishes and kind regards
The Swinging Monkey
'Caruthers, lets raise a glass to a fallen hero'