SOHC conversion to DOHC. Is it Possible?

I Own A 2005 Lancer ES with a 2.0 16V SOHC engine I'm wanting to Make it a DOHC but dont know if is possible. Can any body help me?

without an engine swap? someone correct me if i'm wrong, but that be a helluva stretch.

I'm rather sure there's no DOHC head that will bolt to that block.