I've mentioned this previously but as it's probably been lost..........
I enquired at a VW dealer parts dept when I had my GTI as I wanted a set of ED30 mats. They told me they did not list them as a part so couldn't be ordered !?!?
Has any one else experienced this??
What a load of bollox (aimed at the stealer, not you Greenouse!). The Ed30 mats are an official factory suppled VW part (supplied in a sealed bag, and fitted by the stealer during PDI) - so they WILL have a part number. The stealers are just being lazy, useless barstewards - suppose it would be too much to ask them to break a lifetime habbit! 
Have you actually looked on the underside of the mats, as there should be a paper sticker with the part no on it, though it may have been peeled off and binned by the stealer.
I'd like a second set for winter/summer use.
Have you tried the official rubber mats for winter use? They may not be "cool" but they are certainly top notch, having a lip which prevents water and other crap from spilling over the edge of the mat and contaminating the carpet.
I have purchased some VW rubber mats and they are fantastic. Very practical solution. I agree they aren't the prettiest things in the world but I prefer the rubber ones to the carpet mats.