Will Cal III mufflers bolt onto a Cal II?

[brider]

I have aftermarket mufflers on my Cal II, but they're rusting out. Gotta look for replacements, and as I'm older and less tolerant of their noise level, I thought I'd go back to stock, but stock Cal II mufflers are nowhere to be found (except for that cheap set on ebay I snoozed and loosed...). I see more Cal IIIs, but their pronounced "kink" worries me.

I suppose it all comes down to header diameter and hanger position. Any suggestions for an alternate stock Guzzi bolt-on?