Links to potential hydraulic fixes.

[Gibbo2286]

Somebody was offering them on Ebay for...……………..£299.00 but no longer listed.

https://www.ebay.ie/itm/5270RN-HYDRAULI ... 587850513

[white exec]

Try calling SGG (originally Shalford Green Garage), located at Dunsfold Aerodrome in Surrey. They have a website.
Citroen specialist, who have done a good bit of re-piping.
They should be able to recognise that part number.

Not particularly close to you; unsure whether the car is drivable.

[Gibbo2286]

I've no experience of these guys, just spotted their van in a local car park so googled them.

http://www.frenchcarrepairs.co.uk/

[lexi]

Eurocarcare (citronome) have been pretty good for me all round. On the phone or just pinging off their website with paypal. Ordered a set of those swing arm kits last week. They came in 2 working days. The guys are on the ball.