Try Fishermens marine supply Delta Park or Oregon City. Its where I have purchased the stuff in the past. Might try calling GI Joes to see if they carry it and price compare.
Don't mean to be a pessimists here but I got 2 bad cans of the stuff at the jantzen beach fishermen's marine supply a year ago. It had totally solidified and was unusable.....$40.00 down the drain.
I was very surprised as everything else about that store is top notch.