I am still using opcode oms with opcode interfaces and they work perfect for editing hardware of that era. Not only you can get them for peanuts, you get a rock solid midi system. There are expensive midi multiport interfaces for Windoze, but midi timing on them are a joke compared to old macs midi behaviour.?
You can use a powerbook g3 wallstreet with built-in serial port and you will have a great 9.2.2 mac native computer with a lot less fan noises.
