X-Arcade Dual Joystick $79 (previously $129) plus $9.99 shipping USA till
New Year's.
Good all around MAME Joystick if you don't want to build your own controller.
Link: http://www.xgaming.com/store/promo/product/x-arcade-dual-kit/
Lifetime warranty, adapters for game systems are $30 or so.