shot peening a distributor gear for a roller camshaft

Anyone have any thoughts on shot peening a distributor gear, as to be able to use it with a roller camshaft?
It seems to be a difficult mission to locate/find a Melonized distributor shaft. Or for that matter just a bare shaft that I could mount a melonized gear onto.
Hughes has the gear on its own but no shafts in stock to mount them on. Nor do they have a gear and shaft as a complete package. Mancini has a Bronze Milodon one. But I think I'd read somewhere that the Bronze ones are designed as a wear part and not really made for street use.?

I am seriously considering having one of my spare ones shot peened??
Thanks for any ideas.

Milodon 21535 Oil Pump Driveshaft

Edit; Is it possible to remove the gear off of a stock oil pump driveshaft?