A Browning Auto-5 16 guage? Gunparts has factory stocks and forends. You sitting down? You might want to lie down. Original Browning stocks run $261.90. Forends run $141.60. Breathe!
Have a look here. $100 for an aftermarket checkered walnut stock. $125 for a Browning forend. He has cheap synthetics for $100. He's not Numrich/Gunparts. http://www.gun-parts.com/browningstocks/
Wow. I have bought two Sweet 16 stocks from Browning in the past ten years or maybe fifteen for $80. Anyway, it hasn't been long enough for that kind of inflation. I suppose they are not making any more.