None of the 410s I own have enough metal on the barrel to bore to 32 ga. It would be a truly odd 410 that had enough metal on barrels to bore to that size.

When I have a desire for a larger bore than one of my 410s, I put the 28ga barrels on either my Parker Repro or my Merkel SL. Loads in 28ga can go down to overlap with the bigger 410 loads and up to overlap the 20ga. 28ga satisfies my occasonal "big bore" needs.