HDMI and DVI should both be interchangeable, both ways... Hmm...
http://www.radioshack.com/product/index.jsp?productId=3526549&filterName=Brand&filterValue=AUVIO
Have you tried something like that? It doesn't have to be that exact brand if you don't want to pay $40 for a cable, but something similar should work... I'd get something cheap to try, but if that doesn't work, then I really don't know how else to help you. There really shouldn't be much difference between an HDMI-DVI Cable and an HDMI cable with a DVI adapter, though...