VEVOR Motorcycle Saddlebags, 30L (15L x 2) Large Capacity Saddle Bag Compatible with Grom (2022-2025), Navi, Z125 and Most Motorcycles, Sport Motorbike Side Bag with Waterproof Rain Cover and Straps

https://a.co/d/09diSk65 They're listed as grom saddle bags, but the adjustable straps make them pretty flexible. Edit: I see these are bigger than you are looking for, sorry. 30L total, they are quite compact, but probably not more than you have already.