Okay, I don't know if these are new or just new to me, but I was shopping at Wally-World today and found these smaller Orion signal flares. They actually are labeled as "Campfire Starter/Signal Flare". They have the exact same form factor as the large road flares, and seem to be made the same way (they too burn at 2,000 F and have the normal striker). The cool thing is that they're between about 5.25" - 5.5"! No more cutting a full sized one down for easy carry. Maybe the best part is that a two-pack is under $5!

If your local WM doesn't have them you can order them, although shipping will probably be high. The item number is 750.

Here's a pic from Orion's site:

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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman