Adding Pitch-bend & Mod wheels to a digital piano?

[mgmadian]

Hi All:

I use a digital piano as the main MIDI controller in my home studio...its serves the purpose very well in all respects expect for its lack of real-time pitch-bend and modulation controls/wheels.

Any idea for a fairly inexpensive solution for adding this capability? I've considered the obvious (using another keyboard with these already built-in) and almost-as-obvious (using something like Control Freak/Peavey 1600, etc) but am not nuts about either solution....so I'm now looking for non-obvious solutions.

Any idea if a standard PC-gamer's joystick could be made to do something like this, possibly in conjunction with a MIDI Merge box?

thanks in advance, Greg