Apogee Gio seems to be what you need.
I'm using FCB1010 with iFCB as sysex editor.
This unit is the cheapest I could find and it doesn't come short of features.
-I've managed to make it work in stompbox mode without the UNO chip.
-Stomp on a pedal to Send 5 PC messages, 2 CC messages, 1 note on message to 5 different AU instruments or Outboard processors/samplers at once.
-CCs on Both expression pedals.
-Triggering samples by sending note on messages to EXS24. Ultrabeat etc.
-Tap tempo
All this is programmable for each pedal.
Another controller I miss using is the one that came with Zoom's 2020 (legacy product) or was it the 1010....? Cheap as chips if you can find a working one..
Anyway, happy hunting!
Best.