where can i get a set of rocker moldings for my 1965 chev impala 4 door hardtop it hss 4 pieces

there are both collectors clubs and salvage yards that will work with you, just have to do a little phone exercise~ Back in Wisconsin, there was a salvage yard at Waupaca that was full of oldies---'course that was twenty five years ago, but moving salvaged cars is a challenge, unless you've got somewhere to go with them. Let your fingers do the walkin'---you'll find a source-

Did you try Impala Bob's or Hubbard's ?