Dave,
Yes this looks like it.
http://www.rimmerbros.co.uk/Item--i-GRID001722
And expensive in the auto version which I have.
The pipe looks to go right round the engine and has rigid attachments, and flexible pipe attachments.
I wonder how much extra play there would be if the n/s attachments were undone.
I also do not know how this pipe attaches to the heater pipes which I think are also rigid.
Hopefully with some flexible pipe to allow some play, as the engine moves slightly and the heater does not.
It would make the job so much easier to do if this pipe could be moved an inch or so away from the stat without bending it.
Some room for investigation by someone. There looks to be many with a duff stat at the moment according to the forum.
Matt