You arent likely to find it off the shelf, unless fairly close is close enough, nor a paint code for anything similar from other boat makers of that era. Not sure what you meant by
You plan to paint it yourself?
Several have mixed their own oil based enamel to get close to that color
Woodonglass and
sphelps both did.
Woodonglass also has a great tutorial on painting your boat, the pre-prep and paint info. I'll let him link it. And he can probably help you get some paint on hand, in a few colors, then walk you theu mixing up a batch DIY to see if its close enough to your liking.
Depending on what system you plan to paint with, you might get a closer match having a paint place color match it.