I agree about Dolapcı. It is hard to find quality performing birds.
Hopefully one of these days you can stop by at Denizli and watch Iskender's birds.
Last time I was there I saw some impressive birds.
I am sure he can point you towards a few other quality fanciers also.
I have seen Musa's videos (I think) on the Youtube.
He fly them out of a mobile loft if I am remembering right.