Stevens No. 10 Custom Barrel

[Garnett]

I purchased a custom made Octagon barrel for the Stevens No. 10 pistol.  It was listed as .22 caliber.  When it arrived, I discovered it is actually in .32 Stevens Short rim fire caliber.  It is old and very high quality work.  My question, does anyone have a similar caliber barrel for this model, and has the firing pin been modified in anyway to hit the rim of this larger caliber cartridge?