$3 MegaBucks locations?

The last time I was in Vegas was just a short trip, but all I could find were newer digital MegaBucks. Do any locals or recent visitors know if any MGM or Caesars properties still have the older classic 3 reel cabinets at $1 denom with 3 credit max bet? If you could tell me where to find them if they exist, I'd greatly appreciate it! Good luck to all and I can't wait to be back in town in a few weeks to get my degen on!!