The basic kit price is €602 on the Touratech Germany Webshop, but I decided to pay the extra few quid and have them pre-assembled - part number 01-052-2020-P. It saves a lot of swearing in the garege when they arrive, although there will be plenty of that anyway when I have to fit the pannier rails!
Delivery is planned for Week 15th, and that according to my diary is week commencing 9th April.
On the German site if you have them delivered to a German address anything over €500 is delivered for free. So that is a bonus as well.
Fingers crossed now and wait to see how long they will be.