FZS600/FZ6 rear calliper swap. Feasible?

[mr self destruct]

After five years of Fazer riding I’m getting totally pissed off with my rear calipers seizing. I’ve had my original rebuilt, got a newer one, swapped that for a thou caliper, and they’ve all seized. My local mechanic says they’re prone to it as they’re mounted underneath the swingarm and catch all the shit off the road, which seems to make sense to me.
So, has anyone tried fitting the caliper and bracket from an FZ6? It doesn’t look like the swingarm are interchangeable, but I’m wondering if the brakes can be.
In the FZ6 bracket there’s a recess that mates to a lug on the swingarm which allows the whole thing to slide for chain adjustment.
Maybe if I could get a similar lug welded to my swingarm (or even drill a hole in the arm and mount a bolt with a big enough head in its place) this would fit?