Gerhard...congratulations on your Christmas present !!
I think that if they are priced well, they will sell well. Being 6mm thick is a great bonus, some others are 4mm or 5mm.
Looking forward to seeing it fitted on the bike!
These are similar racks for the Z.., made by one of our British members....
http://www.xt660.com/showthread.php?t=10117