Gumby

SOLVED: Took it into the dealer today to investigate why the failure system didn't alert and to also swap the bulb with one of my spares (since there was no hope of me getting my hand into the tiny gap on the passenger side!).
They confirmed that it wasn't working on with the front lights, then removed a rear light and the system gave a warning. They had to ring Skoda technical support who say this is by design. Apparently as the rears are controlled from the Body control unit, only they will provide a warning. Since the front lights are controlled separately from the light switch they do not give a warning.
They were as surprised as I was when they told me. They didn't charge me anything either and even did a free health check video without me asking. Quality service as usual from the staff too.

Nope, the standard mk2 mudflaps will fit a vRS no problems at all.  I have them on mine and they are more than easy to fit. 
The only model in the mk2 range they won't fit is the Monte Carlo as this has extra plastic trim around the wheel arches, which the vRS doesn't.
I got mine from theskodashop, so if you want genuine I'd go there or to your local dealer.