As last solution, if you stuck, I can offer my help.
Distance is a problem but if you send it, I can try my best.
Received in the past 6 "dead" plutos and only 2 were really dead, the other 4 are working again. 1 with a squirrly signal but it works If it is really dead, I can send you a complete "new" moddified one if you want. TCXO, GND, PTT , whatever you need.
Write me an eamil and give me some days, I do not check every day my mails.
Hope I can help