Turns out I have that "stiching" tool already. Bought it 30 years ago as a tool for replacing the aluminum mesh on screen doors. Works great for that purpose, never have needed it for bicycle patches.

Your link to the tool at Amazon says it is out of stock. It can be bought from several sources, including Amazon as a "spline roller tool."
http://www.amazon.com/Heavy-Duty-Com.../dp/B000NYC7H2

A large assortment is at:
http://www.qualitywindowscreen.com/s...s-c-70_73.html

How do you carry the buffing liquid with you when you are cycling?