I e-mailed Shure the other day to ask about this and got an e-mail back today.
"Thank you for your interest in Shure products!
The SE215LTD were a limited edition product and their production have been discontinued. Availability is subject to retailer's stock."
I'm a little weary of ordering these from a non authorized dealer in Japan because of the whole warranty issue. Now I'm debating whether or not to just look for a different set of headphones all together. If it is like Flavio said and one of their best sellers. It really doesn't make that much sense for them to quit making them. But oh well I guess I will take my money elsewhere.