Exicon Mosfet replacements?

Hi, I'm looking at buying a used amp, an Ashly CFT-1800. The owner says only one channel is working. Meassaging with him I don't think he has much in the way of trouble shooting skills so it could be it's fine but he's willing to discuss an as-is reduced price. To prepare for worst case and figure out what to offer, in my experience (though it's been a very long time), the output devices are often pooched. The amp uses Exicon 10N16 and 10P16 fets (TO247 I'm assuming) but everything I can find that would be considered an equivalent is EOL and NLA except for some parts from dubious sources. Does anyone know of a more available replacement if required? Thanks!