Sucks, clown went carpet surfing

So as the title says my clown I had for 2 months jumped out of a small opening in the back of my tank. Really sucks, not his first time either. Last time got lucky and was in the overflow, but not this time:bawling:.

So my question is how do I got about replacing he/her? From what I understand I have to get a clown that is the same type. Not even sure if they have had time to determine sex. So just get anywhere clown and hope they get along?