Hmm, this may take a bit more looking. I was thinking that the Coleman camping products may work but they include this warning in their documentation:
"During operation, this product can be a source of
ignition.Never use the catalytic heater in spaces that
contain or may contain volatile or airborne combustibles,
or products such as gasoline, solvents, paint thinner,
dust particles or unknown chemicals"

I was wondering if the Coleman type products were the same as the the other catalytic products that keep the process below auto-ignition temperatures.