Also see #12 here https://www.lrworkshop.com/diagrams/land-rover-defender-vehicle-controls/vehicle-controls-controls/clutch-master-cylinder-pipes_53771#12
It's worth getting to know LR Workshop for the site's superb diagrams and part no's.
When I needed a clutch pipe I treated it like brake pipes and bought the fittings (from
Memory I think I had to reuse one end as it was more obscure) an and come cunifer pipe and made my own.
Managed to find a Pioneer flexible pipe on eBay for £44. If anyone else has this problem the part number was ANR2162. I just hope this is the right one when it comes.
I have a Defender 90 1997 300tdi RHD and I am trying to source a new metal clutch pipe from the Master to the flexi. I cannot find one anywhere for a price below £127!! When I enquired at paddock spares they said the RHD one was discontinued...