Only place I could find this spring in Australia, and it was an easy fix for my door and worked perfectly. Way, way expensive price for just a spring, but it's importance and rarity justified the price. Very annoying that Gainborough don't stock them themselves, and would rather you replace the entire TriLock.

Excellent service

comes with spring & nail.. works best

Unfortunately the item never arrived. Auspost tracking had it 'out for delivery' on 18 July, and that's still what it says sadly

Thanks guys