Stronglight is still in business and has a website. I'm new, so I can't post the URL - but if you Google "Stronglight Website" you should find it.
Have you considered contacting them to see if they can help ID the crank and confirm the required spindle length and interface type (JIS or ISO)?
Last edited by Hondo6; 09-01-21 at 09:34 AM.
Reason: Correct typo.