Specifically, I want the left-side vertical menu of Ikon 9 and the full-height right-side widget sidebar of Ikon 3.
I fear the answer is no (without custom coding), since it seems the only way to get the menu to be vertical is in a sidebar, and the theme doesn’t support both a left-side and right-side sidebar at the same time. But I hope you have a trick up your sleeve for me!
Thanks for writing in! Regretfully this isn’t a feature offered by X. It could be possible with custom development, but this would be outside the scope of support we can offer. You may wish to consult a developer to assist you with this. X is quite extensible with child themes, so there are plenty of possibilities. Thanks for understanding. Take care!