so if i get just a 3.3v card will this work in an ordinary mediator like the LT or TX? If yes then where can i purchase one?
Yes it should work. Ebay surely has them for sale. My card wouldn't work but as I submitted the card bios-file to Elbox (Ratte?) they updated drivers and then it worked.
Just don't expect warp3d to work 'cause it doesn't. I wish they backported the OS 4.x version so we could use warp3d with radeon cards also.