The direct email is htkclk at juno dot com. The cost is from $90 to $160, depending on how many BASH chips are bad. Those chips are $30 each.
It's the power supply that makes this amp a real POS. Henry also changes out some 20 to 30 PS parts with upgraded ratings. Underrated parts and heat kill this amp.
Also, turn the system OFF when not in use. It consumes a lot of power idle.
I'll be sending mine out tonight.