I was bored so I decided to give @Tej's suggestion a try. It took well over an hour and the fretboard will need a little more glue & dust in places but I've ended up with a usable fretboard (although probably for something where I want to experiment or maybe practice binding).

@rockpile99 Glad it worked out ok, sorry should also have mentioned that it’s not at all quick, your results look pretty similar mind. I had a small chip to sort too and had to craft a new surround for the truss rod adjuster which added complication as it meant taking the finish off the headstock to get everything looking ok, the chip is too obvious but the experience is worth more than the guitar 🙂

For gluing the board back on I use the cut off head of two small nails and drilled a tiny hole in the back of the fret board using these to align it and then used the clamps on a dry run to press it into the right location. I’ve made a felt covered support that I also used which ment I could put more even pressure on the back of the neck while clamping too. Before sanding there was the tiniest extra fretboard (you could feel it but not see it) over both sides of the neck, still don’t quite understand why but sanded down to meet the body and is fine. A few pics below: