I had a pair of lovebirds. One died. What happens with the other one?? When can I get a new mate?

Well, one of my lovebirds just recently died. I want to get another one, so I have a pair again, but I am unsure of how soon I can get another bird, as well as if the new bird will be rejected since his mate just died. I'm not really sure what to do, so help me out please! Thanks.