Re: swing arm problem
If the problem's the swinging arm pivot bushes, these are not available form Alfa (NOT '*****!) - you'll have to buy a complete arm. Replacement rubber bushes are available from aftermarket suppliers, but I'm told that these are such a hassle & so time-consuming to fit that it's better to replace the arm - depends, of course, who's doing the work.
Removing the arm usually involves sawing out the bolt; not an easy job!
If your car has ABS you'll probably need to replace the rear wheel sensor if you replace the arm, as they tend to be so rusted in that they can't be removed without damaging them.