Paint that looks like chrome?

First thing to do is get some Wesley Bleech-white and use it to hemical strip the plastic. Soak 3 days, rinse well. Go to alsa's website and study the application method of their Killer Chrome. It is dry sprayed over high gloss black, then buffed, and clear coated. The problem with you situation is sticker shock. From their Pla-stik primer to clear coat will cost over 160.00
and be much more paint than you need. Here's the thing though, you can get nearly the same results from "Worlds Finest Chrome In A Can" or similar by following the same Killer Chrome method of application. If you're not happy with the results just toss the parts back in the Bleech-White and start a plan B.
You might ignore all the above and go directly to plan B which is send the pieces to be replated. There is a member here that might do it for a reasonable price. Good luck