I'll have to poke around at Home Depot (best store for backpacking gear?) and see what I can find.
I just did an experiment. I simply cut a 1.5" piece off the end of the rubber tube (drinking straw) that came with my Sawyer Mini filter and slipped it over the end of my needle nose pliers. I then crimped the can with the tubing on the inside of the can and a 1.5" 4d finishing nail on the other side. It worked pretty well. I got nice consistent crimps. They also seemed to be a bit different shape than the ones I get by hand. The dent made by the nail is narrower than the ones I have made previously. I finished the stove (16 ribs) but have not drilled it yet. I thought I might see if I can finds an pin vice drill with a 0.6 mm bit from the hobby shop tomorrow.