It would be interesting indeed to have molded stocks resembling the original, and possibly offering that in different colors. I just don't see the demand and profit margin for it.
And for the most part I prefer the original wood stock of the Mosin, esp if you get one with a nice finish. My M44 will never be modified and I plan to keep it in its original condition as long as I own it.
Now if you bought a 91/30 in bad shape with a cracked stock, then this would actually make sense.