~6mm focal length lens. Recommandation?

I’m looking for a supplier of ~6mm focal length M12 lens.
I find the ones from OpenMV nice enough and not expensive
I’m in Europe.
Does anyone has a recommendation? I’m always afraid to do some china shopping by myself (quality is always random) and at the moment many shops are closed.

Aliexpress is what we use. Or, if price is not important, Edmunds optics.