Hi Kay,
Whilst im not sure the name and the designer, ive seen this light.
When I worked at a radio station in Liverpool, UK, I was friends with some guys who owned a chain of designer interior shops called UTILITY.
Im convinced they will be able to help you. One of the Directors is called Paul.
Hope that helps you
Their website is utilitydesign.co.uk
Their email... info@utilitydesign.co.uk