A suggestion stolen from a sailboat… On each microwaveable dish, run a circular bead of DAP silicone sealant around the bottom. To get a smooth surface, after applying the silicone bead, press the dish onto a sheet of waxed paper until the bead sets. The waxed paper will peel off, laving a smooth, flat bead.
Then you'll have non-skid dishes instead of needing a nonskid pad. The stuff is food-safe, microwave-safe, and dishwasher-safe.
DAP Products - Silicone Sealants - DAP® All-Purpose 100% Silicone Adhesive Sealant
Don't know about its temperature resistance, though. The couple that gave me the idea only had a microwave on their boat, not a microwave/convection oven.