I'd guess that with some bias tweaking, one of the GaN
RF small signal FETs might handle the job nicely. In the
sense of RF performance at least.
You will probably face some problems getting "Hi Rel"
(which usually means military, hence military end use,
hence munition by the lights of US export control)
parts out of US distributors, and perhaps Infineon
had these made in the US and has tired of dealing
with ITAR and just obsoleted the product instead
(or, found that all their business had already moved
on to better devices such as GaN or GaAs discretes).