Looking for an assassination mission one-shot

I am looking for a scenario where the party has to assassinate a noble (or crime boss or whatever) inside their mansion that I could adapt to be the climax of a 2-3 session "mini campaign" for a new group. I've found a lot of "murder mystery" scenarios where the party has to find out who was responsible for an assassination, but very little where they do the deed themselves. The closest I've found to what I am looking for is Infiltration, but the scenario isn't quite what I have in mind... I am thinking of more of a commando raid, or gaining access to the target's mansion through some sort of ball or event.

I would very much appreciate any suggestions.