Personally I've just contacted my lead in Farnell (distributors or Bulgin products here, there and everywhere) and emailed Bulgin (company based on Essex, round the corner from where I live) about this conundrum.

I'm not sure I fully understand what's going on with AT, but I'm sure their legal team will.

It's interesting that in that published list there are some names missing... like Tygon for instance. It's St Gobain Plastics a bit too big to bite into?