Hi mate, welcome to pf.
A set of Ford 071 plugs will be fine, only £15 from R+B motorsport.
Think they will be set at about .6 or .7.
Not sure if you could over haul your turbo yourself as these need to be balanced to a very high speed.
if you do want a kit though Stu at MDevelopments from blackpool does these i think.
Hope you sort it soon,.
Dave.