the pelican or the boulder are your best options. a little more than what you want to spend but they're worth the value. excellent frames. 700c or 650b.
otherwise, take an old sports tourer to a local framebuilder for a little modification. that'll keep you under a grand.
If I were to do it again, I'd go with a tig'd Boulder with a little custom tweaking. Talk to Mike Kone.
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