V50 Monza pannier cases advice

Hi everyone. Seeking help/advice on pannier cases for my V50 Monza - I’m not keen on new cases, but seem to be struggling to find solid information on older cases that fit the bike. Any guidance on what was standard issue or compatible, from around the mid-80s and 90s, would be greatly welcomed! Cheers.

I don’t recall seeing any “standard” luggage for the Monday, back in the day - after all, it was (is) very much a light and lean sports bike… a bit wallet and toothbrush territory? :joy: