Need new key pad for Synapse 2.0

I can't run Synapse 3 and the jump bound key on my Orbweaver Chroma broke off. Which is the newest left hand controller model with a joystick (D pad) button that runs under Synapse 2.0??? I will have to look ebay I know the current models run only 3.0 but which is the newest I can look for that will run on my computer? Please help!