Given a Type, create an Option Type that contains it

Given a Type named inner, I would like to create a new Type that represents an Option containing a type of the same type as inner.

For example, the signature of a method that would do this may look something like:

def createOptionType(inner: Type): Type = {
  typeOf[Option[inner]] // this line is pseudocode
}

This answer helps partially, but makes use of a generic method, whereas in this case I have a concrete type passed in, making generics unuseable.