http://www.behringer.com/EN/Products/FCV100.aspxThis is your absolute best bang for the buck, bar none. It will do what you want, is extremely well built, and I only paid $25.00 for mine. I still use it with my C1 when I choose not to carry my PK7a pedalboard along. The Pk7a has an integrated EXPRESSION pedal (organs do use 'volume' pedals

) as well as two other (assignable) switches mounted on either side of the expression pedal. I can't get used to the side switches (intended for Leslie control) and use a 'half-moon' switch instead (B3 style).
Here's an idea; learn to play pedals (bass) and get a PK7a.
chas