Haven't found anything great myself, but...
Was part owner in a bar at one time. had a guy (a known "shyster") come in with a real nice 1st edition Predator w/ 2 shafts - one of which had a collar that was a little different, and I knew why. He said he'd found it in a pawn shop & wanted $200. I paid him on the spot, and went directly to the office to call the owner - from whom it had been stolen. He was happy to pay me my $200 back & walk away with his cue.
He'd had a cuemaker make a 2nd shaft, and it had a little thinner black band on the collar...along with his initials scratched into the collar face next to the pilot...