Found this on another bike site......... DIY CHAIN RIVET TOOL All you need is cheap pipe flaring tool, and a C-clamp...
Your C-clamp idea is universal now, eh? I suppose this is as good a place as any to explain the cobbled up way I did my chain after our long conversations in chat that day. I bought only the chain breaker tool, not the $100+ everything tool so had to come up with a way to do it using what I had. Unfortunately my C-clamp is an 8" and was too hard for me to cut notches in to clear the master link pins, so..... Used the tool normally to set chain length. Used my C-Clamp to press the plate onto the master link pins until the pins were flush with the plate (two flat surfaces pressing together) while the master link was on the rear sprocket. Rotated the chain so master link was in open area below swing arm. Took the breaker tool, put it on reversed and pressed master link pins thru plate to required depth, one at a time. Rotated chain back to rear sprocket and again using breaker tool, but in the standard direction with a 1/8" steel plate behind so pin would not press out of back of master link; placed a small ball bearing in the dimple of master rivet, turning breaker tool until rivet flared to desired spread on each rivet. Voila, after only 5 times longer than would have been necessary with the right tool, it was back together.
The TOE CUTTER had to help me with my chain once because someone didnt have a good tool and did it half arsed, my chain fell off in the middle of traffic! Great Tip brother!