What's new here: Patio plus typewriter is not a combination I've seen before. If your typewriter is beyond repair but you still love its looks, it can make for an interesting conversation piece and sculptural planter in the yard. Obviously, its condition will worsen outside, so you'll need to be someone who embraces rusty and crusty.
Tips for your search: For older black manual versions, try brand names like Chicago, Underwood, Remington, Royal, Smith-Corona and L.C. Smith. You might also want to try for a specific era; just add "1940" or "1940s" or whatever era to your search.