The reason I bought one for Em's
Ibiza was that it was very 'sticky'.
When I went to change it, I disconnected it from the clutch release lever, and found that the cable was in fact free moving niside the sheath. So I reconnected it, making sure it all went back together correctly, and it has cured the 'sticking'
problem
If you've got Haynes, it tells you
how to do it all in there.
Might be worth a try before you fork out £££ for a new cable.
Also, the job of actually changing the cable looks like a right pain in the arse, as you have to thread it through the bulkhead, and in behind the dash..... you've then got to thread it through the dash and down to the pedal box..... not nice!