Yes you can get the bush off, but you need a decent gear puller, time, patience and a cool temper.  In the end I clamped a pair of pliers round it butted up to the lip to give the pueer something to grab on to!  Best to increase the pressure gradually as well, and it should pop off after several slips

Easiest way is to swap the boss for one suitable for a late MK2 or MK3, and give your old Boss to a MK1 owner
