xbolt trigger springs

iv got a couple of xbolts, love the rifle in every way except the fact the trigger pull is set to about 500kg. apparrently you can get a spring upgrade to make them alot nicer but i cant find anyone that has it in nz. does anyone know of any suppliers? or have you done a home jobby thats worked well?

cheers

I got my A Bolt 2 and 3 lb trigger springs from "Hunting and Outdoor Supplies" No X Bolt on their website but might be worth and email