I’d imagine most everyone who is going to put up already have - retailers like to keep those dollars as close to pass-through as possible. Is there something they are looking for?
G sides shouldn’t be too difficult to find. It’s $21 on discogs: Gorillaz - G Sides (Vinyl, USA & Europe, 2020) For Sale | Discogs
Shuga too, for a bit more. Gorillaz - G-Sides (2001) - New LP Record Store Day 2020 Parlophone 180 gram Vinyl - Pop Rap / Trip Hop / Electronica