This is also my preferred control scheme, and I bought one a few years ago. To see what's easy to find now, I typed "microwave oven knobs" into amazon.com and

This is also my preferred control scheme, and I bought one a few years ago. To see what's easy to find now, I typed "microwave oven knobs" into amazon.com and got several with the classic mechanical timer and power knob design. Most of those are relatively small, but "commercial microwave oven" found some larger ones.