Give either company a direct call as both have equipment that should easily go that high. We have worked at 1850°F several times.
If by chance they can't fill the need I'll look around for a maker of clam shell heaters that could be used.
Yes, an induction heating setup may be worth investigating for heat treating at this temperature. The Ameritherm folks sell a good power supply if that's all you need. If you want an entire custom-built induction heating system, try