Paint code help needed
 

Got a 87-924 that I'm spending the winter rebuilding. Brakes, head and belts etc. Previos owner said it was repainted with 2002 Porsche yellow. Can't get any more from him. Must have done this in his garage. I can see every sanding scratch. Never the less, I need to redo the paint job. Car was originally white. Not sure what to do about the color. If I go with the yellow again, what code do I use? How can I find out?

http://autocolorlibrary.com/acl_files/porsche.html It is probably speed yellow 12G/X4 or you can go with the original 87 Alpine White