If a USB keyboard works I'd contemplate keeping the computer and just using the USB keyboard, or even better get a wireless keyboard so it can be anywhere during a show or rehearsal (yeah still uses a USB slot most likely).

Heck, back in the day Mac and I both had extra keyboards laying on the floor with most of the keys ripped out so we could use the Space bar with our foot to stop/start Biab or RB/PT.
Extra keyboards are cheap, especially when you know they are laying around in the house somewhere.

I do not work here, but the benefits are still awesome
Make your sound your own!