Modern paint codes!

Can any one help with finding a new car paint color that matches or is close to the 1951 Bali blue? The j-45 paint code does not cross over, or the PPG-10742 doesn't cross over to a basecoat, clearcoat. I have a 51 Pacemaker. Any help would be appreciated!
Comments
I just took a piece of the car with my colour and they matched it and gave to me premixed in a spray can ready for me to touch up cheers ken
51 Hornet Sedan
51 Commodore Six Club Coupe
50 Pacemaker Deluxe R.I.P. (burned and destroyed in building fire)
49 Super Six Sedan