I wouldn't trust a "pre-mixed" paint based on vehicle id as the colour does change due to weather ,etc conditions.
To get an exact match you really need a colour match service.
Fortunately, we've got a guy close to us (assuming he's still on the go as he's older than G*d!) that still matches by sample cards and eye.
Spent around half an hour with multiple cards packs until he got the one he wanted. Another 10-15 minutes to mix and all for a cost of less than £20 including an aerosol of clear top coat.
Not that it will help but I went to a local spray shop supplier to buy paint to restore one of my Landrovers.
The guy came outside with cards but said that one’s easy. It’s BMC champagne that’s faded. I thought it was white but he was spot on. He was very helpful suggesting what type of paint I should use and suggested using a roller rather than spraying.
I wouldn’t use a roller on my motorhome but my Landrover looked good from a distance.