Yep, I have made 6 now. Essentially they are the same as making a fibreglass stock. You won't find much on the net about them but it is just fibreglassing.
Read up all you can about how to make a two piece mold off a plug.
There is lots out there about using carbon fibre you just have to adapt it to rifle stocks.
I make a two piece mold off the stock. 4 layers of 6oz carbon fibre with west Systems 105/207, put 3-4 extra layers through the pistol grip area, then put it in a vacuum storage bag and suck the air out with a vacuum cleaner. join the two halves together once it is set (next day).
I make a cast of the action area of the original stock using a silicon modelling resin Wacker 4670. Put the cast in the stock and pour thickened resin around it, watch out it will get really, really hot if you pour too much in at once.
Once the halves are stuck together i glue in the swivel studs and then fill the butt and forearm with expanding polyurethane foam.
I make a fibreglass cast of the barrel channel and then lay several pieces of carbon fibre on it and put it into the stock.
Then tidy up all the areas where the resin and fibre didn't quite stick properly.
Then shape up the recoil pad and glue on using thickened resin.
It takes me about 6 weeks from go to whoa to do a stock.
Flick me a PM if you want.
Stu.