Greenfield Stabilizer. Like $15, does the job for me. Only a single leg and mounts in the rear chainstays, but it works unless you're really overloaded to one side.
__________________
Bikes: 1996 Eddy Merckx Titanium EX, 1989/90 Colnago Super(issimo?) Piu(?), 1990 Concorde Aquila(hit by car while riding), others in build queue "when I get the time"