I don't think it has been mentioned and forgive me if I missed it, but when I was doing stock work, my template stocks were always fully 'glass' bedded to the rifle, including the barrel channel and bottom metal - usually I would have several layers of elastic tape on the barrel to provide a little space for floating. Pre-bedding would make things so much easier when doing final fitting.
After all said and done, I would save the template stock for the next build and just hog it out as necessary to bed the next project barreled action. I had one template stock that I know went back and forth to the duplicator at least ten times - each time fitted for a different rifle.
I always like classic stocks, primarily the Sundra-style and for inexpensive template stocks, would buy plain walnut, unfinished Boyd stocks and re-use as above - the only problem I have with Boyds is they only make the stocks with a cheek-piece which I personally do not like so I would have to grind and re-contour that side of the stock. I also modified a beat up Rem Classic stock moving the pistol grip rearward more like a Dakota style. Winchester Ranger stocks are birch wood or similar and easy to modify as a template stock. You can also use composite or 'plastic' stocks for templates, if you find one with the shape/style that you like. If the template stock was checkered, I would fill in the checkered areas and sand smooth.
If you have similar action and bottom metal dimensions but different guard screw spacing, you can convert a stock, for example a Rem 700 template to a M98 by hogging out and rebedding.
A final suggestion: there are several brands of inletting/bedding blocks for trigger and magazine spaces. I find these to be extremely helpful for both templating and final bedding of the project stock - well worth the investment even if you're doing only one gun - you can always sell the bedding block online here when done