Lehman's also carries Tattler Reusable canning lids. I've not tried these, but have heard good reviews.
Used flats can often be used for vacuum sealing jars though, if they've been opened carefully and are still perfectly flat. Test the seal after you vacuum seal the jar; if it isn't a good seal the lid will simply come off the jar.
If you don't have a water bath canner, you can use a very large stockpot with lid. It should be deep enough to allow three inches of boiling water above the tops of the jars, without splashing over. You must have a way to keep the jars up off the bottom metal surface though, since stockpots don't come with a rack like a water bath canner does. You can line the bottom with canning rings (the screw bands), or put table knives on the bottom, fanned out so that the jars can be set on top. You might be fortunate enough to find a cake rack or a wooden rack of some kind that will fit your stockpot.
By the way, simply putting a towel on the bottom of the canner will not work. I've tried. In fact, I used a dark green towel, with the jars on top of it. The towel floated to the top anyway, and it turned the water green.
What are you planning to can this year?
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