Original GM Trunk Weatherstripping - 1968 Camaro Standard Base Model

[gwp4]

Hi First Gen Camaro Experts:

I'm trying to find GM factory correct trunk weatherstripping for a 1968 Standard Base Model Camaro with a production date of May 14, 1968.  I'd really be interested in the GM part number and where I can actually find Concourse level judging acceptable trunk weatherstripping.  I've heard that Soft Seal makes a decent aftermarket weatherstripping, but I'm not sure the judges would accept it.  Many thanks in advance.  gwp4