You have two options. You can contact a junkyard or auto recycler and see if they have the type you need. If they don't your other option is to go online and search. Ebay can be a good source for used parts like that.
My suggestion would be to either call a local junkyard. If that wouldn't work you could also try asking around or post an advertisement in the newspaper saying that you are looking for one. Hope that helps.
