I wish I could point you to a fast, affordable source, but I can't. You've covered the commercial bases. I've not been unhappy, by the way, with the "slow" shipments from E-Cig. One took nine days, one took a month, and the most recent took two weeks. All cost $9 in shipping fees (order lots of cores and accessories at the same time).
I've done some do-it-yourself liquid made from cooking tobacco. It doesn't have the measured nicotine hit of commerical liquids, but serves to "cut" the commercial liquid and customize flavors. Use any type of tobacco -- pipe, cigarette, cigar -- and put about 10 grams in a small pot on low heat. Add a half-cup of water and let simmer for about 30 minutes. Strain off the tobacco through a coffee filter or cheesecake. Bingo! Instant tobacco flavor liquid. Mix this with "extra high nicotine" flavored E-Liquid and you'll get something less potent with a custom taste. See our "Combo Flavors" post. I like the commercial flue-cured tobacco, coffee, cherry, apple and menthol flavors. I add my own vanilla extract (see places to order under Combo Flavors). Next up will be "rum cigar" flavor, and Kahlua coffee flavor.
With what you have on hand, and what you can easily make, you should survive through the Olympics!