Woof! I have a complete, working IBM 3101 terminal (got it from a former co-worker who used to use it to work from home at CompuServe) and it's tempting to sell just the keyboard. -ethan
Just use an arduino to make an adapter so you can use a USB keyboard with the 3101 terminal.
If you used a clicky non-poured keycap RGB one you might be able to make it change colors when it beeps.
-- : Ethan O'Toole