OP, I believe hyacinths and irises are planted in the fall, so there won't be many of them anywhere. I know you probably wanted to see the peonies in person, but of course they don't bloom for a few months so maybe online is your best bet?
http://www.hiddenspringsflowerfarm.com/
http://peonysenvy.com/
I've never bought from the above (doing my garden bit by bit), but I've drooled over these plenty!