Quoted from lb1:I have this and it works great http://www.arbortime.mountainminded.net/html/the_better_tonka_rivet_tool_-_.html. It's no longer for sale though.
With some encouragement, Vid might be able to pull out some magic yet again and come up with a $40 alternative that does not require buying a press and set of dies.
I purchased this tubular rivet clincher about a month ago on Ebay. Keep checking as they are usually offered about once per month from this seller.
Gord