its cheapest to find them in junk yards usually about $25 and i got a friend to make the bracket you might check Quality Air Ride i know they have up to a 04 but i dont know about 05 and up here is a link to some good info on EDC's and it tells what all you models you can find them on at the junk yards.
http://www.gmt400.com/forum/showthread.php?135-Engine-Driven-Compressor-info