I have a larger rod that isn't part of my carry gear. It's 4 inches long and 5/8 inches diameter. No handle or anything, just the rod and a TSA-friendly scraper. Picked it up from Learn to Return Training Systems for $14 a few years back.

http://www.survivaltraining.com/

Even though they don't have any gear listed on the website, they do offer a handful of select items. Inquire about the "large metal match." Take a look at the courses too, they're a top-notch group.

Standard disclaimer applies.

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(posting this as someone that has unintentionally done a bunch of stupid stuff in the past and will again...)