98 stocks...
Bulls-eye 8--People have been modding 98's ever since the first G. I. bring-backs, quite some while ago. As a result, there are lots of retro parts for them.
I think Awesome Possum has a good suggestion--Start going to gun shows and look for an old retro stock for a 98. Fajen's stocks were really good back in "the day." (A side thought--Whatever happened to Fajen's Stocks the company?? They made good stuff.)
If you buy a new retro stock, Boyd's is IMHO a good choice. The company is very helpful to newbie gun restockers; their 'phone people are used to explaining things and making good suggestions. Their directions that come with the merchandise are clear and complete.
If you want to glass-bed the stock (which IS a good idea) I'd do an old stock on something first, as a learning experience. It's not that hard to do, but having one stock "under your belt" will help your confidence when you do the Boyd's stock "for real." (I glass-bedded a cheap plastic stock for an SKS, before doing my Boyd's stock for a Yugo M-48 Mauser. Was glad for the experience.) Midway has glass-bedding kits; for that matter, so does Boyd's. If you're going to glass-bed the stock you should get an "unfinished" stock--that means not varnished nor finish-sanded, in Boyd-speak. All the inletting is done except you might have to make a few minor adjustments with a fine file or sandpaper.
After final fitting the stock to your 98, and after glass-bedding, you have to finish-sand and varnish the stock. Sanding is the most tedious part of any woodworking project; this one will be no exception. Sand the entire stock as smooth as a baby's butt, then dampen it and sand off the whiskers. Then sand it all over again.
Boyd's sells varnish kits, but I went with ordinary hardware-store spray-can satin varnish, and local sandpaper. 5 coats, sanding each one almost off except the last, and I called myself done. Rifle doesn't look half bad in its new stock, and it shoots well to boot.
Hope your restocking project goes well. Please keep us updated on your progress, and we all like pix!