I've seen how-tos on home made Clorox wipes... I'm pretty sure all you do is cut a paper towel roll in half, put it in an empty, well rinsed Clorox Wipes tube, and pour a specific amount of bleach solution over it. Pull out the cardboard tube, and voila!
I don't see why it wouldn't work with Star San solution instead. Try at your own risk, though.
Patched Kettle Brewery
"Drilling more holes than we need to, since 2010."