Thanks! I was actually thinking along the same lines after looking for a bit online and seeing several references to the K772 ball joints.
Also found these boots from speedwaymotors.com
Replacement Screw-In Ball Joint Dust Boot, K772 Application
Hopefully I can find a good replacement, but I'm pretty disappointed with PST. I'm not happy about having to buy separate replacement parts after buying their "complete" rebuild kit AND contacting their customer service. But I don't have time to keep calling and arguing with them. I'll eat the lost cost and just make a note to take my business elsewhere next time.
I appreciate the input!