I use a 5gallon bucket with a bucket tool lining installed and a sit on top lid. It cost me about 15$ total and it subs as a very strong seat while your working on something. Just put the fuel and battery in the middle of the bucket, drill 2 holes for the electric starter wire and fuel tubing.. and the tool lining can hold everything I need.. starter, glow ignighter, fuel pump and whatever else... and its light easy to carry!!! I will try to take a few pics later and post them.

here's a pic you can see it in the distance.