I know that this seller is across the country from you, but if you can't find what you want locally, I highly recommend Diane's Daylilies. She's in Utah, and has fantastic plants at fantastic prices. I bought all of mine from her, except for maybe 3 or 4. She is the same zone as you are, and is totally honest about which ones do good for her and which ones don't.
http://www.dianedaylilies.com/

Thank you both!

You are most welcome! Also, if you are looking for flower seeds, Diane sells those, too. I recently bought some from her, and the seeds are great! Not sure how good I will be at growing them, but I was amazed at her huge selection!
http://www.dianeseeds.com/