Will any honda key blank work on the nsx or does it have to be a nsx specific key blank. Reason I am asking is I lost my keys somewhere and I only have the OEM Gold Metal Key left. I would like to get some copies made just in case. Nsx key blanks at the dealer are $20 for the plastic which are no longer available and the Monal metal key is $110. Just wanted to know if the other honda key blanks are the same and if they work ? I hope someone has done this and can confirm that the regular honda key blanks will work on a 91 nsx