One thing you want to make sure of when replacing switches with non standard ones is whether or not they will fail when dirt gets inside them. There’s a reason that Moog has chosen their ‘loud’ switch, it’s all about durability. If you keep your Foogers on a table, they will of course stay much cleaner than if you place them on the floor and press them with your feet (especially if you’re wearing shoes that you wear outside as well).
The Echoplex Digital Pro comes with an optional 7 switch foot pedal and these are super quiet. Though they fail all the time if you don’t keep them clean. You may want to go in that direction.