Have you looked at places like Xometry? I know SendCutSend is working on machined parts and not just laser cut and/or bent stuff but not sure if they are accepting designs yet even for costing. There are others as well.
My only thought is I like parts I can buy at a local store if I need to replace them. Not an absolute, sometimes there just aren't options, and sometimes the OE options aren't very good. But sure nice to have the option to replace a part with something from a parts store if you are on a road trip rather than wait for a part to be shipped someplace.
I like the first one best just because of the size. But if I was building an LA and needed one it would probably be the last one just because it uses an unmodified OE part.