The complete airbox is $300 + shipping & tracking
I see you are in the UK, my son has a few in Barcelona,
thus diminishing shipping costs.
Kindly advise at: alberto.guirola at gmail.com
Just a thought but I'm running a pipercross airbox and that has a cone filter in the intake end would this not be a solution for you guys running the original GTA airbox ? The photo is the pipercross filter it pushes in point end first think they do 75 and 100 mm diameter
ITG make filters to any pattern you want if you can draw it they can make it so if the sizes pipercross offer don't work they could sort you one