It's a shame you are not asking in a couple of months, we have bought a house in Orkney but havent completed yet.
I don't know anyone up there at the moment either. Everyone I have spoken to has been really friendly. It might be worth asking on the poultry keeper forum too, I was told when I joined that there were a few members from Orkney.
There are also lots of Orkney facebook pages that might be worth a try if you are on facebook. Orkney Merkitplace and Orkney Communities would be good places to try.
I hope you find someone!