Your Best bet for Zing it/ Lash it GB is via
http://www.reddenmarine.com/ Give them a ring if you order in bulk you would get a great discount, as for the GB with Dutch i wouldnt hold your breath, this is just a side line for Thom and i know he has a lot of work on with the normal orders! you may also struggle to get the Dutch clips via him as he gave all rights to "Jacks r Better" regarding the clips and Biners. worth a try tho, i will be watching out to see what happens!
2.2mm Lash it will work fine with the Hooks & Flyz but i would go no bigger as it will wear away at the rope fibers....
One thing to watch guys- Dont pack your ridgeline with hooks and Flyz on in with your nice new Sil/Cuben tarp as you may snag it and tear a great bloody hole in your kit! keep it seperate and you will be fine.
Mat