Your wheels are the same as on my 1993 Plus 8: mine do not have any spacers between the wheel and the hub. Perhaps what your tyre shop is referring to is an adaptor to centralise the wheel on their machine? On the car, the cone on the wheel nuts sitting in the countersink of the stud holes does the job of centralising the wheel.
I guess from your spelling and vocabulary you live on the western side of the pond?
