Why not just telephone Dax and ask them? They are alive and kicking in Jolly Olde.
(+) 44 1279 442661
www.daxcars.co.uk
They will probably need the age of the car etc.to tell you which shocks you need. BTW I could not personally recommend Spax - many folks find they do not last very long. Ask Dax what they recommend these days.