Nobody makes 220 monochrome format anymore...some of the last was Tri-X, which you would need to find via eBay or similar secondhand good sites. I bought two pro packs of Tri-X 320 ASA just recently, so it is still around. Looks like Fuji ended production of slide film in 2009, Kodak must have been around the same time.

Here's a link for using 120, which sounds very do-able.