I bought a set of piston rings from GSF today. Amazingly I only paid £8 for the full set for all four pistons. They are Goetze/Federal Mogul ones so I think OE quality. The bloke in GSF said they were so cheap because they are getting rid of stock and they will soon be obsolete. He even reckoned they were going obsolete at VW too. He said they have 5 sets left and then that's it. They will still be available from engine builders and the manufacturer but by the. sounds of it, not VW or GSF.
So if you think you'll need a set in the near future, get to GSF and grab a bargain. I was tempted to buy a couple of sets but really seems pointless. Next time I re-ring pistons for my g40 it'll be oversize pistons.