The Digitech BP-8 valve has the whammy build in, as well as the newer multi effect pedals from Digitech.
I also use a Zoom 505 (guitar) with an expression pedal. I like it better than the Digitech, there's absolutely no delay in the signal. The catch: you can only choose between pedal up or pedal down (one octave up/down)
Welcome on this board, have fun and good luck!