My first hit was at Himeya's new online shop:
http://www.erogeshop.com/advanced_se...ywords=shuffle
http://www.erogeshop.com/product_inf...cts_id/1002671
They will want you to be over 18 to buy any of their products (or at least say you're over 18).
That is, of course, full
bite-you-in-the-ass price as Himeya is prone to charge (basically the full price when it was new with no discounts). You might also try
www.nippon-export.com. They don't have it listed but if you write them and ask for it, it has been my experience that they try really hard to locate the merchandise for you. They may be able to find it in some bargain bin and pass the savings onto you. Once I was looking for a poster I'd spotted of the character Fuuka from Yotsubato.... they reported back that they found it had been a poster only used on buses -- and that they'd even asked the bus company about it. I had this mental image of them scrounging the bus station dumpsters...
Anyway, they get a fair amount of my business.