Seashell is a pink, many nurseries have it. Look at www.paeo.de lower left hand corner click on the "e" after the S. This is one of my favorite sites to look up different cultivars. On some of the names you will see a nursery name on the left of the discription click on it and you should be connected to the nursery that had it available. Sometimes nurseries will stop carrying a certain cultivar. Not all the nurseries will have their 2006 list ready yet.

Sea shell is absolutely fantastic, I got mine from Ferncliff, not the greates reputation but mine bloomed the very first year. I guess I was lucky.