jon, check with Sid at droppedaxles.com.
http://www.droppedaxles.com/CONTACT_INFO.htmlhe should have a good rebuilt set that he can sell you. as far as i know nobody sells dropped spindles for our trucks. if so i would have me a set.
another thought, could a machine shop weld up the bushing hole, then redrill and ream the hole to the original size ?
good luck.
leonard