I have a brand new set of 20" Lamborghini Revuelto titanium OEM factory lug nuts.  These were just pulled from a brand new Revuelto and boxed.  If international buyer please email for shipping.   I believe these fit the Aventador as well but please research this as well.

The Lamborghini Revuelto uses titanium lug nuts with an M14x1.5 thread size. The overall length of the  overall length of the lug bolt is 59mm, with a 26mm head width and a 32mm shaft length (including a 22mm threaded portion). These lug nuts are commonly made from Grade 5 Titanium (Ti-6AI-4V) and feature a conical seat with a floating washer. 

Here's a more detailed breakdown: