Wanted - 500 Sport Desmo

Hello all,
I am looking for a good 500 Sport Desmo. Would appreciate help in tracking one down.
Either for cash or part/ex for my 1991 900ss.

Thanks for looking,

Hi all,
My quest for a good, running 500 sport desmo continues.
£50 reward for anyone who can connect me to a purchase!
Merry Christmas to all Ducatisti.