Saflager S23 is available from most retailers
Barley Bottom Stocks that, S-189 (Hurrlimans) and W34/70 (Weihenstephan IIRC) . . . Got to say that of the three my personal preference is for W34/70 . . . produces a cracking pilsner if you can keep the temperature below 12C (Ideally), under 15C it's still excellent