When I got my 46 Burb most of the wood on the RH side under the window was in bad shape. I sealed it in epoxy to keep it from getting worse.

I then found a good cabinet maker and for $750.00 he reproduced every piece on both sides that was bad.

I then sealed all of it in epoxy and put it all back in place.

I tried several places that advertised that they did this but none of them had the information in order to make it for me.

As for the 4 window frames, mine were still in very good condition so it was not an issue. I just sealed them in epoxy and went on and stored them till I get to that point in my reconstruction.