Hi calia,
That dress is really pretty!
ok here's what I found....
ASOS.COM slightly cheaper than the one you showed, but it's an option?
Chilli Pepper | Chilli Pepper Kaftan Tunic Dress at ASOS
Then a slightly more expensive one but here one from frenchconnection.com
Bex Beads Kaftan Dress - Collections - French Connection
Hope these help and hopefully I have posted the links ok?
Best of luck on your search for the dress!
Jodie.xx