DDR4LYF wrote
Tried Mantech? You could also use a DPDT switch like that and only use one side. Maybe use the other side for another pedal that needs a tap tempo?
You will most likely need a momentary, not a latching switch. I got mine from GT Electronics in Boksburg and did exactly waht |DDR4LYF suggested. I used a DPDT mometary switch, used one pole for the Boss DD5 and the other for my tap tempo tremolo. So now I have one tap switch for two pedals. Incidentally, some circuits require normally open contacts and others, normally closed. With the DPDT you can always use the other contact if you get it wrong first time.