Thanks for the reply.
I did take my Driveshaft with me to the junkyard, and I found a driveshaft there that would have fit, but the u-joint on that one was almost as bad as on the one I am replacing.
I found a site (Rockford Drivetrain) that sells replacement u-jonts for staked in "non-replaceable" type u-joints, and has instructions, so I'm going to look into that.