As @
gugie mentioned, I had very good luck matching the paint on my black 1969 Competition.
And "luck" is definitely the right word, but I think it would work for the OP too. I just bought this:
https://www.rustoleum.com/product-ca...=Gloss%20Black
The OP's frame is in a sketchy area where I'd be unsure whether to do spot touchup or fill in the divots and spray the whole thing. For spot work, the Rust-Oleum is available as a liquid.