Both of my venders for chroming plastic pieces are no longer in business. Does anyone have a good recommendation?

I do not know anyone in your area but try contacting a manufacturer of awards and trophies.
It's a long shot but they may be able to work with existing single plastic pieces for re chroming (or tell you who can).
Usually they plate pieces by the hundreds at a time, but they might just accommodate you.
http://www.americantrophies.com/

Go to www.advanceplating.com (http://www.advanceplating.com) , Located in Nashville , tn . - excellent chrome plating facility ! Good Luck ! Just my :2cents: ! I see you're located in California, this company may be too far for you unless your items are small enough to be shipped ?