headlight size?

[still-asleep]

I see links here and there for sealed beam conversions for 4"x6" headlights and 165mm headlights and those have been referenced to the f-bodies... I measured mine and they are the 4703/4701 series which measure out to be like 3.5" x 6". I think both autoptiks and eurolights are out of business, so I was wondering if there is anything I can get to convert my sealed beams. all the searches came up with old links referencing autoptiks, etc. what size is 165mm.. is that close to the 4701/4703 series size? not sure if they measure that diagonally or what they do on those metric measurements I've seen.