Try Poguemahone (tall bikes) and sykerocker (about 56cm).
They'd probably want to meet you first. I think there are others.

A guy here on CL wanted to come here for 6 weeks and rent a bike.
For $50, he could ship a bike to REI and get it assembled and adjusted for another $25.
For $50 back, it would be at his house right after he arrived home.
$125 total.

That's a whole lot cheaper than renting, and when he said he didn't want to do that, I figured he was scamming.