I'm glad you are safe. Very glad you found the problem and are able to fix it.
This is 4". Google the PN. There are a number of places that sell it.It's also called Speed Tape.
3M ALUMINUM PROP TAPE 427 - 2 INCH 3M Aluminum Foil Tape 427, dead-soft aluminum foil backing, excellent heat and light reflection to protect against high temperatures and U.V. degradation.www.aircraftspruce.com
It's 'duct tape on Steroids' basically.