>>821632Hardware stores carry them. Auto parts stores carry them. Walmart carries them. They're not too hard to find.
And they're about $10 for a 3-pack for the 15-minute ones. 30-min ones are a little bigger, more expensive (about $5/ea), and harder to find.
15 minutes of fucking-hot flame, striker on the cap... easy to use and strike off while wearing gloves... for about $3? Worth it.