Being the year it may not be true chrome plating. Look up a company call "Goodrich" with "wheels" using google.
Should come up with a company that does a relatively new process that is being used on new cars and alot of aftermarket
wheels. They have distributors that do the process, alot thicker then chrome too. Haven't checked cost in years I was looking
for an alternative to chrome when I was have one off parts made.

Here is their website.
PermaStar Chrome - Home Page