The biggest problem is finding Saff bumpers with the fixing brackets not broken off. I bought a rough one but the brackets were good, so I drilled them out and got them plastic welded into my bumper which had broken ones. It fixed it up a treat with no more sagging and when it was re-painted and had new black inserts it looks brand new again.
I did offer the rear bumper to Glenn for free but it would have needed a fair bit of work to fix it up so in the end I took it to the dump.