Yes those Imperials will work, but to make it work you'll need an additional interface like an Opti-PAC or a hacked mouse. You couldn't just use one straight into a PC. If they took a picture of their best one as an example, though, you've got your work cut out for you. You'll end up paying more to fix them than you did to buy them.
Do you need more than 1? I've got 1 I could sell you. It's PS2 compatible so it doesn't require an interface. It just plugs directly into your PC like a regular mouse would. If you absolutely need more than 1, I have a second one I could probably sell to you, too. I'd planned on using it in a machine of my own, but I could use the cash right now.