They are starting to appear, although I can't get. them yet. I don't know of any in this country that comes with it as standard, but I haven't looked at the brochure this week - And that about as often as VW seem to keep adding bits lately.
It used to be the 'Sports steering wheel' on the T6 Caravelle as an option.
I loved paddles on my old T6 TSI, as you really had to use the revs, when I changed back to a diseasel I again added paddles, and never used them, I just find the diesel engine so much better sorted to the Transporter (And Im a massive petrol head, and my old TSi was 300ps)
Use them all the time on the TCR and RS3......Must be a petrol thing