Mot sure what you mean by "good stock making chisel". A good chisel is about as good as the guy sharpening it. I've got cheap and I've got expensive and there is not much difference when they are sharp. I just have to sharpen the cheap ones more often.
I have made a number of chisels for special applications, but none of them are any good if they aren't very sharp.
A good place to buy chisels is at local auctions. You can generally buy them cheap and alter them to suit your particular purpose. But again:....they must be sharp, really sharp.
If you are doing a lot of gunstock work, a couple of "cranked" chisels are very handy.
