I agree with the comments about cutting it to size but i'm like you and like little details. This is the stuff I referred to at the top of the thread (it's not on a VW but it gives an idea of the look).
I know it's not quite what you were after but I looked everywhere and it was the best solution I could find.
I think I know the trim you're talking about Lynx. I call it tadpole trim because of its profile! I have it around the edge of my floor and also along some of the edges of my units where they butt up to the carpeted panels. I'll try to take some close up photos over the weekend so you can see if it's what you are thinking of.
Its called 'P' trim. Usually available from the likes of grassroutes and conversion suppliers. We have used it around wheel arches where its difficult to scribe a panel perfectly due to the multiple angles.