Until the illusive THERMITE MATCHSTICK is invented, you might try the standard CADWELD charges. They are a plastic can with thermite and their own starter powder. They can be found on EBAY or your local welding supply store for ~$3.00/can - usually 10 or 50 tubes per box.
Cliff Harrison
Horseshoe Bend, ID
American Redoubt
N43.9668 W116.1888