FWIW, I do not particularly care for “generic” parts, or “white box” parts as I have heard them referred to.
I prefer original manufacturers parts when they are available. (Girling, Lucus) Given a choice I would rather buy something used, and then have it re-built, over a new generic part.
For example, the PO of my car removed and lost the carb heat shield. I never considered buying a new one, instead I went to a reliable source of used parts and asked them to find one. They produced three, gave me a choice and charged me $50, which I happily paid.
Last month, my clutch master cylinder failed. I never even looked in any catalog, I went to the same reliable source and asked if they had, or could order, a Girling master cylinder. They had them in stock, it cost $100. I just looked on-line at a “usual suspect’s” catalog, it lists for $75, who knows where it was made, or who made it…
I’m lucky, I have two sources for used parts, each has dismantled 100’s of LBCs, (they each advertise in Hemmings), and one of those is a very good source for new parts. He ships to every corner of the globe and has been in business, at the same location, since the 1960’s. I have no interest in his place, other than I hope he stays in business for a long time. The name of the place is Midtown Auto.
https://www.britishusedautoparts.com/
I’ve heard nothing but good about Tony (The Autoist) and if I ever have a need for a Moss part, I will use him.