Hi, I have a Topeak rear pannier rack. I use an Ortleib Office Bag on the side. I have a handful of items I’d like to keep on the bike — I don’t need to take them into the office in the bag. Since I have a rack that is only used for one pannier I figured a small trunk bag would be ideal. The problem is that they are all huge. I only need about 2 litres of space. I’m thinking about maybe trying to make something. Does anyone have any ideas? Thanks!