ISO high altitude (3000'+) hatching eggs - Bielefelder, Welsummer

[crystlln]

I'm looking for hatching eggs that are coming from a high altitude. I've had horrid luck with shipped eggs and I think some of that may be because I'm hatching at 5000'. I'm willing to try shipped eggs again, but not low altitude ones!
I'd love some Bielefelders, but interested in Welsummer, Whiting's, Hamburg's, and Silverrudd's too.