I have bought pigeons from stromberg's, they ship in about 4 weeks usually, they do contract out to different lofts for the actual pigeons, but their shipping prices are rediculously high. Depending upon what breed/type you want, and how much you wish to pay for it, have you considered FOY'S pigeons, or one other website I have found to be reasonable is,
http://www.whiteracers.com, I personally have not ordered from either of these sites, but have read fantastic reviews on other forums for the white racers, and FOY'S is advertised as reputable by the NPA, as well as quite a few people, even on BYC who buy their pigeon supplies from FOY'S. I am considering buying my next racers from one of these two because their prices are far more reasonable than stromberg's.