You can order bumper bolts out of Mustang parts houses that will fit a Maverick - other than that, you're out of luck
Do you currently have a bumper? If so, a chrome plater will weld up the bumper guard holes if you tell them to before plating. It is done all the time. Otherwise, if you do not have a bumper, look for a core on ebay or place an ad here in the classifieds wanted section.
Autokrafters used to sell them, but i don't see them listed on their website anymore. You can look through their catalog: http://www.autokrafters.com/v4/go.g...26&s=autokrafters&t=&product=45092&d=products But I remember the price being really high, it wold be cheaper to buy a used one and have it re-chromed.