It seems simple enough to fabricate something for the task, but I rarely have enough tool time for the more serious projects that I have floating around in my head to spend any time on this. I was certain that there had to be something available at a low cost for this simple task.
I am pleased with the results of this item: super clamp small, from ebay about $8



The clamp can be easily adapted into a simple tabletop vise using the 1/4 or 3/8 inch mounting threads on the base of the clamp. These clamps are used in photography work and many types of mounting adapters are readily available.
I hope someone else finds this useful.
-Nick
additional photos imgur album http://imgur.com/a/xitmB/all