18mm end links for 7077 flat link

I’m looking for a set of 18mm end links to fit a 7077 flat link and 50s/early 60s Seamasters/Constellations (ref 2577, 2767, 2846, 2852, 14381, 14393, etc). I believe #4, #7, or #630 will fit, but there may be others as well.

I have a feeling the flat link will look great on this beauty in particular..