As noted, SEM is a great source for this kind of paint. Do you know the original paint code for your interior paint? For my '68 El Camino it was M17 Medium Blue. I got a great rattle can match made by OER: All Models Parts | PP808 | OER.
I did a Steering wheel on my 85 by going to a auto paint supply store. They used electronic device to scan the interior color I wanted to match. They made few ounces that I used in my air brush. They said they could have put in a spray can?