I don't think that's correct, for the simple reason that if those papers existed the (sigh) pro-leak folks would be linking them everywhere. Virology isn't exactly a trillion dollar field, we're not going out and sequencing every virus in every species. The Yunnan cave made news and was well-studied because someone stumbled on a SARS-related virus there, that says nothing about where that virus went later.

Those papers don't exist for the simple reason that "interesting" bats don't live there.

You might want to consider that while R H Ebright can be offensive and distateful, he has been banging this drum for 20 years and is generally very careful when he makes a factual statement.