This premixed can might be close, and it can be used on carpet & fabric, but it's expensive and I'm not sure how many cans it would take to equal the coverage of a pint. It's also a noticeably-different shade of gray.
This one might be a closer match, but it's only for plastic & metal; not carpet or velour.
https://lmr.com/item/MET-FV45/93-Mustang-Opal-Gray-Vinyl-Interior-Paint 
