You might have to shim Monza cans to fit. Many years back, when I wanted cans for a V50, I was sent same for a V50 III, with collar shims, as the V50/II had smaller diameter pipes than the III and the Monza. Long time ago, could be wrong. But probably your best bet, worth investigating. There isn't going to be much of anything else off the shelf for what you are trying to do. Otherwise, custom made.
TdF