What about patching old school?
We still have an old heat patch kit (but I think we're out of the patches). This will probably be hard to visualize unless you've seen it, but it's basically a C-clamp with a die as one of the pads(available in triange, round, or square and are interchangeable). The rubber patch is attached to a piece of cork-wood about 1/4 inch thick and the same shape as the patch. This is pressed into the die. You smooth out and clean the area to be patched, then clamp the patch kit on. Then you light the cork on fire and let it burn. It will burn for just long enough to fuse the patch and the tire cleanly, and it's a lot cooler if you're a pyrophillic like me. I never had a patch fail.
This particular kit isn't something you'd take out riding, although it could definitely be made small enough if Park or Topeak or someone thought it would sell. It's still quicker, however to user a regular glue patch, but not as cool