Just go to your paint store and tell them it's toyota 621. They looked it up for me in about 3 minutes and I was out the door 30 min later with a gallon of Rustic green base.
621 IS the paint-code. It is your shops job to look up the code to whatever they sell (ppg, lesonal, etc..).
I used Lesonal base (wanda) and then I used PPG DELTRON clear.