As suspected, it killed my link. Anyway, search **** for "spray foam insulation kit" and most of the results you get will be that type of product. Touch N Seal, Tiger Foam, Foam It Green, Froth Pack, Fomo Handi Foam, etc are all those kind of kits. Again, just be sure you get closed cell, not open cell.

Many of these will be available on the websites for the individual products, sometimes at better prices.