I saw one but can't remember where. It was a super-sized totebag. I'll think about it. I want to say Fons and Porter's videos but I'm not certain. Maybe someone else will know. It sure would make transit easier. If no one pipes up, what about taking a simple tote pattern and just enlarging it to whatever size you need for your largest item to fit? Most of those simple totes just give measurements for cutting the fabric. No pattern piece is involved. How deep a fold you make on the bottom corners will determine how large the base of the tote will be. In fact, Jenny has a tutorial on making a tote bag. You could use some quilted fabric or make your own and just make it whatever size you want. She'll give the method for construction. I've made two by her tut. Super simple to make. I love making my own quilted fabric. It's really fast if you use masking tape for a guide if you're doing a grid pattern. Otherwise, this would be a great project for practicing FMQ.