Well I was looking for Christmas presents and I happen to come across a blue tooth controller from GameStop. They were $29.99 but they are on clearance for $9.99. They are sold out on line so you will have to call around your local shops to see if there is stock available.
I found one and it has a built-in battery with USB charge cable, pairs with Windows as a keyboard so it will work in your cab and the two analogue joys are arrow keys and I K J L keys. It has an ESC key and Enter so it works with Android Tablets very well. Has two triggers and shoulder buttons and the set up is better than the PS2 controller. Nearly the weight of an 360 controller.
For ten bucks you cannot go wrong, especially if you have a cab that needs two cheap controllers for your emulators.