I think my original RWII was about $25 or so. Granted, this was pre-SJisDead Syndrome era. My current one came in a //e that I bought for $25 off the A2-web classifieds from someone in Chilliwack, BC.

This one isn't as cheap, but, considering how it is the SJisDead Syndrome era, is still reasonable.

http://www.ebay.com/itm/380808140412

You could always get this and switch between four cards in a given slot...

http://www.ebay.com/itm/261361596770

-J