Amazon has the Slime PowerSpair 48-Piece Tire Repair Kit for
$49 with free shipping. Features heavy duty 12 volt tire inflator with 16ft. coiled air hose, 3 minute inflation time and adapters for inflatables and Slime tire sealant that seeks out and instantly seals puncture up to 1/4".
eBay with 1SaleADay has the 31-pc Roadside Emergency Tool & Auto Kit for $13 with free shipping
that slime crap is TOTALLY WORTHLESS!
Slime does work but only on minor punctures to the tread like from a nail or small piece of glass. If you have a 1/4" open hole in your tire (not sure how that would happen unless someone took a power drill to it) this won't be effective.
It's a nice little kit in that it comes with the carrying case for everything, otherwise you could piece this together yourself for around the same price.
For this price just buy a tire road hazard warranty and let someone else do the work.
I don't think I would want to be slimed:
https://www.youtube.com/watch?v=j2nYqyfDMnQ