I bought mine in June from Midwest GunWorks for $79.00; you will find it listed as a Sako P94S complete firing pin P/N#S5940145;
it comes with a firing pin, firing pin spring, and retaining pin.
added note I also bought a extractor assembly for $35.54; you will also find it listed as a Sako P94S extractor assembly P/N#S5940229;
it comes with a new extractor, extractor spring, and pin also.
those two parts are interchangeable between the Sako Quad and Sako 94S.
those are about the only two parts you will ever break on a Sako.