Autolube Oil Sight Glass

Replaced my cracked autolube oil sight glass with a new one 6months ago but it has cracked again already wasting a lot of oil. It seems that the ones available at the moment aren’t very good. I have seen an aluminium alternative but I don’t know who has them. Any hints? I know everyone will say ditch the autolube but I’d like to keep it for the time being if I can.

Thanks

Do you take a pillion a lot? This is the most common cause of cracked sight glasses I come accross(pillions with clumsy feet). Provideing you don’t overtighten to start with they are usually ok.