Exhaust Fix Options

[MY95]

So my backboxfell off last week, went to try and fit the new one but the bit it clamps onto on the midbox has came away whsn the backbox fell off, do I buy another midbox and wait for that to come  again or get the backbox welded to the thinner midbox pipe end, if the weld holds anything more than a year that would be ideal as the klarius backboxes only last a year before snapping off anyway