first off welcome to the site
and I have heard of some folks FIXING the stick stock issue by using acetone, to clean the sticky off, restoring things back to a sticky free surface, I have also heard of folks soaking things in dawn dish soap with some luck!
might be worth doing some google search on them things
as for stock makers, a lot depends on what specific model sako you have
McMillan makes some great stocks, not 100% if they have complete drop in stocks, but they should be able to get you darn close, that you can finish at home yourself if neede with a little effort on your side over a true smith being needed!, but even if a smith is needed , it shouldnl;t cost that much!
https://mcmillanusa.com/mcmillan-rif...unting-stocks/
and there are also ton's of other stock makers that sell replacement stocks
Stocky's
https://www.stockysstocks.com/