There are usually a couple of 425s out there with double triggers, if you are into that kind of thing.

I’ve seen a few Beretta shotguns with separated monoblocs over the years, but, it can’t be a common issue, there are so many of them out there. Also heard about a few loose ribs on 409 Berettas, again, not common.

Best of luck in your search. The 20s are getting spendy.

Best,
Ted