PPG Waveterm & PRK keyboard repair needed (with working Wave 2.3) - Adelaide

[Anamnesia]

Hello, I'm looking for someone (or somewhere) in Adelaide (South Australia) who is interested in repairing minor issues with this mid-1980's Synthesizer Computer System from Palm Products Germany (PPG), comprising of;

* PPG Waveterm A (music computer) - fault either with the mainboard or the floppy disc controller for the Shugart 5.25" disk drive
* PPG PRK (Processor Keyboard) - communicates with the Waveterm, but doesn't bulk dump ROM data - I think might be a power supply issue.
* PPG Wave 2.3 (Synthesiser) - this is actually working A-OK, 100%

More information of the PPG Synthesisers can be found here; https://www.ppg.synth.net/

I have a LOT of information, mostly from the CD-Rom compiled by the page curator; https://www.ppg.synth.net/cdrom.shtml

The faults I'm experiencing seem to be down to age; dodgy PCB traces, Power Supply, or Floppy Controller/Disc issues.  I'm confident it's nothing mechanical.  All this gear is Motorola MC6809 based & bog standard TTL Logic, but I'm no electronics engineer...

Happy to pay for your time/services, or if you know someone who would be a perfect fit (located in Adelaide), please pass me their info.


- Cheers!