We don’t have a conservatory so I might be talking out of my arse.
However, David has battled with rain issues and guttering for our garage, the canopy over our patio doors, and his various observatory sheds.
Guttering profiles, and the brackets they fit are NOT standardised and kit you buy this year might not fit whatever you buy to patch up problems in the future.
Whatever you decide to get, and it’s probably worth replacing the lot in one fell swoop, buy some extra lengths of guttering, end stops, fittings and brackets, to have as spares.