I dont think they make X2VGA's anymore, if you have a link, please share.
The HDPRO's come from China, i recall a hobbyist saying it took him 2 months to get the thing. Never got the lowdown on whether it was worth it.
Another alternative:
http://forum.arcadecontrols.com/index.php?topic=119841.0
*Requires a modded XBOX*
This does me no good unless you plan on building me one, and by that time, i might as well get one of the boxes for the same price, no?
I've found a few Dell 19" monitors for like USD 30 a piece. Want to know if it's worth the trouble, cause if none of these work then im screwed with a closet full of monitors.