Check these out, then: https://www.perfectcircuit.com/eurorack-modular-synths/hungry-robot.html?price=75-150.01&tabIndex=price The Hungry Robot modules are housed in stompbox enclosures, and seem like a really good fit for users who've realized that "hey...I need a..." after their build is done. Cheap, too...I think the highest priced ones top out at $150.