I made a small batch of Top Tube Bags recently. I’ve already sold most of them, but I have two left. They are made from X-Pac and are water resistant. They are very handy for touring, commuting and randonneuring.
They can be mounted either against the stem, or against the seat post. I use them against the seat post for taller items, like chain lube, and tools. The stem position is great for your wallet, phone or snacks. I’ve got two of them, but I can make more. Just drop me an email.