A bit late, but Exmoor has a couple of videos on how to fit canvas hoods etc.
http://www.exmoortrim.co.uk/videos-showing-how-to-fit-our-quality-products.html
You're buying outside of UK or EU, so no need to pay VAT for you.
I order from the UK for shipping to Malaysia, same, no VAT. You might get hit with import duty in NZ.