Thanks for the quick response guys, much appreciated. I obviously would prefer to keep the car original and these wheels have created an issue but trying to source 16 inch Lexus rims is nigh on impossible as far as I can tell. There are other issues I need to deal with anyway eg. boot leak and slow retracting seatbelts, so there is no urgency on these wheels but in due course I will have to deal with them.
Thanks again for your help.