Not for a panel mount, since that is essentially the same as an IEC extension you can leave it unmounted and just plug into the normal cable that comes from the wall. An alternative is to make essentially spacer so it sits further out to provide the necessary clearance.
Depending on how long that back portion is and how comfortable you are at wiring your own IEC connector there are solderable panel mount connectors such as this, You will need to ensure it's properly insulated and not going to short out to the case.
Harlequinn reacted to W-L in low profile AC power connector
