Still searching Drag Wheels' website. It kinda sucks because their server likes to stop responding after a while, but I'm still looking for you. I can tell you this much, though, it's not within the first 83 pages of their rim collection..
Granted, they show 6 rims per page. I'll let you know if I find them.
edit: 95 pages, couldn't find them O_o
The search continues.
edit 2: Alright, got the wheel model. Took a bit of searching. Looks like you have the DR6's. Looks like they're an older model, not even on their website anymore.
Unfortunately, I couldn't find anything on eBay that wasn't a full set, and not just a single rim. Good luck on your search for a replacement, though. Just so you can see for yourself and compare, http://www.ebay.com/itm/DRAG-DR6-RIMS-17X7-8H-42OS-GLOSS-BLACK-/220887391992?hash=item336dea1ef8&vxp=mtr