For customizers who want to use the Yvonne body with Mego parts here is a simple hack to adapt CTVT feet to that figure. This will allow you to use Mego foot wear on Yvonne.
Take a CTVT foot, sand/cut down the flange that fits into the Yvonne ankle so the pin hole lines up. If you make the hole in the foot flange a little bigger you can reuse the Yvonne ankle pin.
Remember the ankle is removable. If you put a Mego boot on a bare foot and have to remove it, it'll take the foot too.