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Don, my 2013 Vintage Speedster is 'Ivory', which is probably the 'cream' color you describe (it was one of their most popular colors then).
I bought the car new from VS and at the time they told me they were using an old Chrysler color called 'Linen Cream', which was used on a number of Chrysler cars in the '70s (I think).
At any rate, this seems to be good information as that's what I've been ordering from a local auto paint supply house and using as touch-up paint ever since (a small bottle seems to last about a year before drying up). My car has been garaged since new and the out-of-the-computer mix is still a perfect match.
The PPG/Ditzler code for this color is 3358. That's all my paint shop needs to work from.
Cheers!
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