I found several places that sell Pinhil Claret Symphony.
This is the seller that I bought mine from several years ago. I like Roycroft, they sell good plants and send good bonuses, but they usually do not have the best price. You have to pick and choose and it is best to buy when they have a sale going on.
http://roycroftdaylilies.com/c...
I also bought more PCS on the LA, seller ID: Scapehunter. He lives in Connecticut. I won 3 F from him in 2009, he sent 5F. Price was $18.
This seller is one I have never bought from, but they do seem to have a selection of L and VL. They do have PCS at a cheaper price.
http://rockhavendaylilies.com/...
This seller does not have PCS, but they do live in your zone so I bet any they grow would do well for you. (You may already know about them but this is also for anyone else.
http://www.harmonhillfarm.com/...