Rusted rear cup above spring.

Not sure what this cup is called. What are my options? Can this part be replaced?

Yes, the old one can be cut out and a new "cup" welded in (apparently). Cups can be obtained from John Snijders (fastjjs@gmail.com) for 80 euros a set plus postage (info from René aka Reben on the Forum, dated April 2018)

It's the rear coil spring tower, an item I can supply, just waiting for new stock.

I'd be interested too

Thanks Joe.

Any idea when you might get them in?

I'll give chase and see where they are with the order.