I recently had to remove all four locking lug nuts from my RX300. The key for the lug nuts had become unusable. My question is this...I want to replace all four with a standard lug nut, but Lexus wants almost 20 dollars a lug nut, but I was told that due to the nature of the lug nuts on this vehicle having a washer attached to the nut, I would be unable to use a standard lug nut set for 15 bucks for four? Does any one have any suggestions? Could I use a standard lug and put a washer on it? I know that the standard lugs are tappered on the end that fits into the hole. Any help would be appreciated...thanks...