DSF

Is it ok to stick cutted vinyl on them? Are there any sublimation magnets available ?

Yes, you can stick cut vinyl on to a magnetic sheet.

No, there is no sublimation solution for car magnets as far as I know.

If you are going to be doing this yourself, make sure you purchase car grade magnet. Otherwise it will fall off over 30 miles an hour.

There are two vehicle grades..... low speed and motorway rating.