I went against Richard's advisement and bought a Perrin PWI-1 kit. Richard told me that there weren't spares, but I couldn't pass it up. Used, but comes with two pumps, revision 3 so the bugs were worked out. It's complete minus nozzles, but I've got 10+ sitting in a bag right now. It's going to sit until I get a bike, but I thought I would come clean. Now I feel better.