Source for old Burnham A/C control board, head unit?

[K447]

Hello,

I am trying to assist a contractor who needs to replace a damaged control board in a Burnham A/C head unit.

My understanding is that Burnham stopped making A/C equipment in 1994, and parts are generally not available.

Are there alternate sources that may be able to supply a replacement, or possibly repair the existing board?

Thank you in advance

[K447]

After speaking with someone from Burnham, apparently the A/C units were actually Hitachi ductless A/C units sold under the Dynazone label.

When Hitachi exited the North American A/C market circa 1994, Burnham discontinued support a few years later. Burnham relocated to a new facility about four years ago, and any remaining A/C parts were discarded at that time.

Any pointers regarding sources for older Hitachi (Burnham labeled) ductless A/C head unit control boards?