You'll never find an MT rental, unless it's an exotic, i.e. Porsche, Ferarri, etc., which is no more worth the $$$ to learn than finding a driving school to teach you.
My caveat to that, is that if you're willing to spend the $$$ to learn go to a race school, like Skip Barber or Bob Bondurant, and drive their cars. Not only will it make your overall driving significantly better, but you can beat up their cars without worries.
If you want the car, buy it! Don't worry about that fact that you've never driven an MT. You'll learn very quickly and before you know it you'll be looking for a lighter flywheel and more grabby clutch!
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