I can't get the link to paste across but, if you try wayfair.co.uk and put in endron crystal chandelier you'll find something fairly similar - a little more fancy but it has the 'up, down, up' wave you like.
Thanks everyone, its really appreciated. Think some of those come pretty close. Whats interesting is that if you look at each light 'arm' it goes up, then down, then up again. I havent seen any like them anywhere else (but love the Nigel Tyas and Jim Lawrence ones so it hasnt been in vain).