Figured it out. It's a Bridgestone Driveguard:
https://www.tirerack.com/tires/tires...um=245WR7DGRFT
My local tire shop can install one Monday for a little cheaper than Tire Rack, and they're a race shop so they can shave the tire to match the other tread depths. So problem solved for now. Still curious to know if the 1% rotational limit applies front-to-back or just across.