I mixed up some araldite, then after letting it sit for a couple of minute to start setting, applied it withy a cocktail stick around the area that had broken. i built it up slightly bigger than necessary & used the cocktail stick to keep it in shape until it set.
Once it had been left over night, 10 minutes with a needle file set shaped both sides to get a fit, stuck the 1st spring & plunger back in, gave up geting the ball bearing & 2nd spring in, screwed it back together - making sure the switch slider is in the rest position (marked on the pcb). plugged it back in - works perfectly

£115 saved, I'm sure it won't last forever, but, I'll keep looking for a scrapyard replacement that doesn't take the p*** pricewise
