Where to get one, and where to get a "good" one are two different questions.

I bought this one from Amazon a few months ago:

http://www.amazon.com/gp/product/B00MAMDTHW/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

And it's REALLY low quality. I mean, it will stand being hung in a home or office, etc., but would never survive outside.