Heat Guns for Heat Shrinking
I used to fly R/C model airplanes and needed a heat gun to keep the wing covering tight. The heat guns are not really all that expensive and are great for heat shrink tubing, drying off wet clothing spots, warming up something that is cooler than you want it to be, or even shrinking the shrouds on wine bottles.
Sure, boiling water works great, but with a heat gun all you do is plug it in and go. Most heat guns have a fan setting to cool the nozzle down when you are finished.
You can probably find a heat gun at your local hobby shop or craft store. If not, try eBay... if that is not sucessful try an online hobby shop like Tower, Hobby People, Hobby Lobby, etc. You will be glad you did.