That was cyclegadgets but I don't see a listing anymore, they probably just bought a certain number. You could call to see if they have plans to get more.
http://www.cyclegadgets.com/Products/orderbysku.asp
I just got an email from CycleGadgets letting me know that the Migsel I ordered a month or so ago should ship sometime around the end of August. The email said that the manufacurer reported that they had a problem with the anodizer but it's fixed now so they are catching up on backorders.
I'm thinking it is probably worth waiting for. I have a temporary solution in place for now that works, but I'm expecting to like the Migsel a lot better.
Like someone else said, if CycleGadgets has them in stock, the put a link on their website. If they are out of stock, they take the link down. You can still order one, you just have to call them and let them advise you that "you may have to wait a while." My guess is they believe that providing a clear understanding of what to expect probably makes for better customer relations - and cuts down on the negative comments.