We sure do!
You will need the Replacement Hardware Kit # RHK. When on the product page of the # RHK you will need to select Curt from the drop down menu, and for the hitch item number you will enter 13272.
The Curt Trailer Hitch Receiver # C13272 you mentioned is confirmed to fit the 2016-2019 Lexus RX 350 so as long as the vehicle you are installing the hitch on is one of those model years you will have no issues.
I included videos of the products mentioned for you to take a look at. view full answer...