Cheap MIDI Foot Controller

I've tried looking this up in the archives and there's less info than I thought I'd find. I have an Axe FX and a FCB 1010 on order. The FCB will control all of the Axe presets and functions. However, I'd like a second, smaller, cheaper MIDI controller to communicate with Möbius exclusively at the same time. Any recommendations based on what you know would work? Thanks!