RE stocking a Sako Vixen .222 in plastic is akin to painting a new Ferrari lime green, using a rattle can.
If what you want is a synthetic stocked rifle, sell me the Vixen and go buy one OR tell me what you want in a rifle of reasonable or similar value to the Sako and I will try to find you one post haste with which to trade you out of the Sako before it is desecrated in such a manner.
As to your original question, I would think it a long shot that there has been enough demand for synthetic stocks for these small actions to make tooling up for one a financailly feasable idea for the stockmakers out there. I could be wrong, have been before (once or MAYBE twice...
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Nice rifle you have there. Got one myself plus its older counterpart or ancestor, the Sako Riihimaki .222.
