Maybe I’m out of date but I’ve always thought that the best saddles were made of bone. The last time my SCTR needed a new one, my luthier took a piece of blank bone from his supply, checked that it had even density using a light bulb, thicknessed it to suit my saddle slot, carved it to profile adjusted the height, restrung the guitar and I took it home an hour or so later.

I totally fail to see what sort of magic bone Martin guitars or anyone else for than matter, can supply. It might be better visiting the local butchers - if you still have one!