Not sure you found anything yet, but we just started pumping around the same time. We found a local lady who sells and makes something like what you are looking for. She calls them Roo packs. http://roopacks.blogspot.ca/
She asks what sort of material you want it made out of, or can send her the stuff yourself. We bought 1 and he loves it so far. We'll be getting 1 to 2 more for washing purposes in the next few weeks. They are like a mini fanny pack specially made for insulin pumps. Hope you find something that works for ya'll!