This isn't quite Luv-It, but it will do in a pinch.  :) It kind of makes me think of what it would be like if Dairy Queen and Cold Stone had a frozen custard love child...There are plenty of mix-in choices, and the frozen custard is rich and creamy.  The drive thru is very convenient, but eating it in the car before it melts can be dangerous.  I recommend taking someone along who can feed you while you drive. :)