You can buy stocks from CZ. I am pretty sure cz will give him a free replacement. The early 550 magnums had a problem with cracking.
Yes, Wayne can sell you a take off for less than a new one from cz. Once again, I have heard of this before and CZ made it right. You should not even have to ship the rifle,
One other note, the early stock from CZ on the big magnums were kind of fancy grade. That was part of the problem and the current guns have straight grain (aka stronger) stocks. Functional, but not as pretty.