Last year I had to replace 2u-clamps on the front mounts of the main silencers. Bought plain ones from Halfords as a quick/temp finish. Smeared some copper grease on them it resists heat up to a point. They are still good after 7k miles.
Further forward on the system the flange joints are badly corroded so will soon need replacement. Finding replacements will be a soon to ge done search. The system itself is stainless(manifolds are cast originals and in good nick) so mild steel fittings seems a bad bit of penny pinching. So far the flanges I have seen may not suit as they need to slip over the cat/downpipe flared ends before bolting up. It looks like they are fitted before the pipe ends are flared/forned. I will search for split flanges