https://intl-outdoor.com/noctigon-xp16-v2-copper-mcpcb-2pcs-p-712.html?zenid=0647c6790601ec906412716bbe745b92
Yes those boards sand down pretty easy with a belt sander. They are also thicker than the original that will need sanded down.
It’s a lot of work but you end up with a copper custom fit PCB board. For the connections just scratch of more of the trace (red masking) revealing the copper underneath.
Better pic here. http://www.mtnelectronics.com/index.php?route=product/product&product_id=94
Mtn also has a 10mm board that could possible work, I have never tried that personally.
MTN XP 10mm Copper MCPCB
It probably will have to be thinned some as it looks thicker than original also.