Thats a pretty tough thing to discover. I am sorry to hear it.
As for replacing, you will want to stick with the ocellaris, though I believe most of the designer clowns (Picasso, black storms, etc...) are actually ocellaris. Avoid maroon clowns, if I’m not mistaken.
The trick will be getting a juvenile, one that is smaller than the female in your tank. That should ensure the new fish becomes a male.
Pairing may not be immediate, and the female may be pretty “aggressive” toward the newcomer. It is mostly just establishing dominance and expecting the smaller fish to submit in an acceptable way. Which is typically having a seizure while showing it’s belly to the larger fish, from what I’ve read (and seen a bit of when I paired my clowns)
I am again sorry it happened, but hope some of this may be helpful!