I didn't realize you meant a leica of the Boba cartoon existed. Was this on the official site? And did someone preserve it?
As it was part of the HS, I would presume CBS got it on tape. There is no reason they would have had to telecine it themselves.
The R&R DVD didn't mention the specific loss of anything else. Studios don't seem to like to talk about such things in detail, if the Universal backlot fire a couple years back is any example.