Controller without Keyboard

I don’t use a keyboard and want to add more expression to already written hand-edited MIDI notes. Need some sort of controller, not involving a keyboard. As the notes are already written, I do not need piano keys.
Have seen devices such as EX2M and FS2M - expression pedal and footswitch to USB MIDI - from
Is there not some single USB device which works with Cubase and which has precise faders, allowing me to adjust volume, expression, modulation and vibrato for example? Is there such a beast?

Yeah there’s loads:

Korg nano controllers are inexpensive and have 8 sliders and a few knobs here and there. They can be mapped to control VST etc. Handy and won’t break the bank.