I think part of your trouble finding a reader is a misunderstanding about which card is used in the eBookwise. It uses a SmartMedia card. They are no longer available new except from JR Music (http://www.jr.com/delkin-devices/pe/DEK_DDSMFLS2128/
) but readers are still around.
I don't have much luck finding readers at JR Music, this one is from Tiger Direct. I don't own one of these and don't know any more about it than what's shown but it should work just fine.
As an aside, DO NOT remove the card with the reader turned on. There have been reports of the eBookwise being damaged by doing so. I put a small flag of tape on the edge of my cards so I can get them out without resorting to tweezers.