Frit Happens is still going, just. It used to be very active, before the mass migration to Facebook. And I hear that that applications to join may disappear into someone's junk file and not be noticed immediately.
I recommend that you persist though. Email again. There is a mine of useful information there, all searchable. When you manage to batter your way in, search for 'natural gas', and you will find some good info - a few years old admittedly.
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