Growing up, we've always had a huge stockpile of glass gallon jars. Korean households purchased virtually all their kimchee in these jars, then saved them for when they made their own.
Otherwise, I've seen some fancy glass jars (vintage-looking Martha Stewart brand with a metal screw-on lid) at Kmart that are gallon size. I think Target carries something similar. Pricey though.
If your health-food store has a refrigerated bulk section, you can ask them to save their pickle jars for you. Maybe a local deli could do the same (although many of them now seem to have plastic jars now).
Hope you find some. They're so handy to have around.