I have for sale a pair of Moto Guzzi Branded Givi Monokey Panniers. I think they are 28 litres each.
I bought then second hand and fitted new locks a few years ago and they come with 3 keys and a spare matching barrel for a top box if you have one.
There are a few scuffs and scrapes but there are no cracks. I have used them for camping trips, but now have a Breva with Guzzi panniers so they are surplus to requirements.
Collection from East Yorkshire, or I can post to UK mainland by arrangement
See main Marketplace on the club site for pictures
£80 plus postage
https://www.motoguzziclub.co.uk/marketplace/moto-guzzi-branded-givi-panniers