Where can I get a double usb cable so I can connect 2 computers to 1 printer?
You either need to get a switchbox, or connect it to one computer and share the printer via networking. The downside of this that computers have to ne networked and the computer that the printer is connected to has to be on whenever the other computer want to print. The switchbox is the other solution. A manual switch box is the easiest and cheapest solution. Here’s one you can get. A slightly more complex and expensive solution is an auto switch. It costs $20 more and requires that software be installed and running on the two computers.