I don't think that the 13 inch rims on the 85S Auto's came with wheelcovers at all, only the 14 inch rims (on the 85S manual and 100S) had them. It would have to be off a model not sold here (Uno perhaps?)
For some reason the automatic Regata came with 13 inch rims instead of the 14's on the manual, what it was escapes me at the moment.
Troy.