ZIrcon Blue is use by various manufacturers - it is a pretty generic name, the OEM code you have quoted is so ambiguous that you can guarantee it will have been used by several manufacturers.
If you have no idea of what manufacturer or year the color is from, but you do know what the color looks like (?) you could try & get a bodyshop or paint supplier to let you have a look at their PPG chip books / fans - but it may take some amount of looking to identify - Dependant on how up to date & how far back their chip collection goes.
You could also try contacting PPG's automotive refinishing department, I couldn't find a number, but there email is autorefinish@ppg.com - if you get no luck that way, dig up some numbers for PPG refinishing & phone around the houses, as someone somewhere will be able to give you the correct information.
I spent about 10 years using chip libraries for identifying & mixing PPG automotive paints - so I don't really envy your position!!