That is the kind of thing you are looking for, as long as it is rated for motor start applications. You should also be able to find it from Surplustronics. Make sure you have the right dimensions, and you get them also with leads coming out of the can instead of terminals. Then there are metal cans and plastic cans, you might have a mains clearance issue if you replace a plastic can with metal. If you are stuck, post a photo of the capacitor and we can see what we can do.