Anyone know of an independent tech out there with experience in Bryston amplifier?

Why not ship the amps to Bryston? They charge very modestly for service and have a US address.

A potential buyer claims that they wanted $900 a unit.  Not sure if that's true.  Messaged them a couple times, and have yet to hear back.  Combined with shipping, it's not feasible.  

If they have references for Bryston service, I would consider. If not, it's back to the factory. You don't want inferior parts put in any Bryston equipment, I'm a Bryston fan.

Should you be within 3 hours, I would drive them there, for the safety of the amplifiers.

7B’s are,amazing,amps, lifers for sure.

don’t mess with some hole in the wall shoppe, have Bryston do the work.

if you,must,ship, pack them with gobs of large bubble wrap, triple boxes, foam, peanuts, etc. 

   good luck.