All is not lost...

I doubt very much you will receive any satisfaction from either Federal or S&W. Barsto no longer makes that stuff either.
However...

Assuming there is no damage or deformation to the slide or frame... My advice would be to acquire a chunk of 10mm bore barrel blank then seek out a skilled machinist/gunsmith who can make you a new barrel assembly. There are guys out there that specialize in this kind of stuff... Fabricating parts & assemblies for obsolete firearms.

I'd take a stab at it myself if I had the machinery. Unfortunately I'm still saving up for some big machines, and that only after I finish out the shop.

Best of luck

Cheers
Bill

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Because they don't make a .46