There is some spray stuff in a can that we use.
It's called "Fire", really potent. Spray that removes bad oders, deep bad smells...yeah, stuff like that.
You spray that in the front vents (bottom of the front windshield) and all around the interior of the car...the ceiling, floor, and the trunk) Let the car run with the A/C on full blast for at least 20 minutes.
And you wait till the smell dies down after another 25 minutes.
That should do the trick.
Now all you gotta do it find some spray.