i had to order Barge from Amazon because i found out they dont sell the original formula in California. But in the mean time i have been using hot glue. it works ok for some things but i wouldnt want to use it on my helmet i am in the process of making.
I'm partial to Barge myself, but Best Test, Duall, and Devcon all make good contact cements. I'm sure at least one of them will be in your local hardware stores.