If you buy another stock, you’ll probably need to cut one of them down.
If you have a table-saw, not too bad to do.
Back when all I had was a radial saw, I build a jig like this and it works well. Just don’t move or slip once you start your cut.
A really fine saw blade is needed and can be expensive in and of themselves. Tape helps to keep fine splintering down.
There are several way to cut off excess. You can use a hand saw and flatten any high spots with sandpaper wrapped round a big mill bastard file or other flat object.
Takes patience anyway you go.
Kick pads are another tale especially soft ones like rubber or Sorbathane. Wrap the entire stock up so the rubber dust doesn’t get on the wood as it can be hard to get off some finishes. I like Kick-eese. Here’s their vid:
kickeezproducts.com
After getting off as much excess pad as possible with a belt sander or rough garnet paper on a block sprayed with WD40, then go finer using wet-or-dry paper. Wear a mask - nasty.
There were times when I thought paying a smith a couple hundred would have been a good investment. Now, after a bunch, it’s pretty easy. That first one I remember all too well …..
