TAD-125 Hibachi Dragons 2007A Series

To anyone out there I'm sure I'm not the only one that has or had Paul Grzybek (RIP) my friend, product line in the mono block models that he had sold through out the country. I'm in need of a circuit board for one of these model units & I would be grateful  if someone would stir me in the right direction to find one or a complete unit to get me up & listening in stereo other then in mono as I'm doing for the time being. I love this product & my tech in Abq,NM. can't find this exact circuit board in which it has to be found to match up. Thanks for any input,Dean.