Since its the 9000 that they have to replace, why not make it a 1kw plus killer radio?
Direct Sampling with a 12 inch Screen. Make the radio with a ultra clean 1.5kw LDMOS amplifier with predistortion. Even 1kw would be OK. Palstar seems to have engineered a low IMD 1kw LDMOS amplifier. To make the Whole thing manageable build the power supplies into a dual speaker box that's separate from the radio.
It would be such a great radio that each unit would cost $25,000 and they would sell ten of them.