If you find one, you find a group cos like attracts attracts like.
Not providing a proper link or proper reference (where link unavailable) is rather dodgy (& bad form) on the web, which was invented to solve this exact problem.
Sending people to go hunting for sources leaves much to chance, and they may fail to locate them. It's simply not a logical way to support a claim or convince skeptics a claim is true if you care about your claim.
No one is obligated to care about your argument more than you, especially if you won't care enough to support it properly.