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Hi I`m Jack and perhaps i can help you with this .
For the main board part #TNPH0692ABS that is no problem , you can get it at the link below ;
But for the buffer board you will need to be a bit more specific , for example is it the SD or SU buffer for the y-sustain board ?
You also have the C1 and C2 logic buffer boards
Here is also another supplier for the main board ; https://www.tvrepairtips.org/panasonic-tnph0692abs-board-th-42px75u