Does Anyone Know Anything About Old Typewriters?

I have a 1936 Royal KHM typewriter with a 12″ carriage. It’s in working order, but needs a new ribbon. Does anyone know where you can buy vintage typewriter ribbons? Or, maybe there are modern ribbons that can fit onto this older spools?

If you know anything about old typewriters and can offer some words of wisdom, I’d love to hear from you. Please email me. Thanks!