Lucky for you, I'm getting ready to paint my bahia red 70S and found that Glasurit produces classic paint codes for Porsche in most of their paint ranges.
In fact, they even have an online tool to show the formula (might help a local Glasurit dealer)
Link to classic car colour search to verify code:
Glasurit Classic Car Colors
Link to paint line formulas:
Color-Online
Regards,
Andrew M