If you want to set a tyre plug you also probably need a small jack in the car (and wheelwrench). Finding the leak with the wheel on the car...might be a challenge.
Those small cheap 12v tyre compressors take an age to fill the tyre.
As for tyre plug kits, I've used the cheapest china plug kits with success.
Like these
http://www.ebay.com/itm/Safety-Car-B...-/281993211117
A small jack, wrench, plug kit and compressor probably take up the same amount of space as a slime kit
