Kameo Kid
Super Freak
Well, I already got a replacement boot, which was a bigger issue.
Here's my original question again:
From the sound of it, the replacement bodies are for broken joints...
Or you can also derive that people with joint issues are the only ones who have contacted SSC in regard to a replacement body. Perhaps, others haven't found it be noticeable enough to trouble themselves.
Anyhow, by the sound of your initial question and the way you have concluded this conversation, it seems as if you have either formed your own conclusions or this was all rhetorical.