34 Europa, I wonder if you can describe in more detail exactly what the state of the decks is..? Why I ask is the damp deck core tends to be something folk tend to make a huge issue of, but in reality the core is just in there as a stiffener, right..? It is not structural, and it does not have to be watertight, or even completely dry for that matter. Yes, the way they used to lay down teak decks before the era of epoxy gluing them down, the screws always damaged the integrity of the top sandwich of fibreglass, (GRP), but as long as the under layer is not leaking, damp core is to some extent just a fact of life and of curiosity value. After all, as I said, the core is sandwiched between an under layer and a top layer of GRP. Apart from acting as a stiffener it has no other function.
It is possible to do an acceptable repair by removing the old teak, sealing all the screw holes with a suitable sealant, then laying a new stiffening layer over that, (? preferably a synthetic these days, and not ply, but new ply would do), and then covering it all with GRP cloth mat and resin, and creating a new non-skin GRP deck finish, like many of the new models are finished anyway.
By what authority do I say this..? Simply having owned a CHB 34 (1975 era) for some 13 yrs, where the previous owner had repaired it that way, money being an issue for him, and I have to say it was fine. The decks are slightly, (I prefer the term springy, rather than soft), and they have never leaked, look fine, and would appear set to last another 30 odd years. To do a major strip-out of the top layer of GRP after lifting the old teak, then stripping out the old core, replacing that, then new GRP deck layer would have cost thousands more, taken way longer, and resulted in a slightly stiffer, but cosmetically and functionally identical result. And as most will also confirm I think, although you might 'bask in the knowledge' it was done, that extra high cost will not likely be reflected as added value in a subsequent sale.
Just a thought to put things in perspective.