I read in the dutch magazine Linda today about a new line of children's clothing from the Antwerp based designers Assemblé. Its uniqueness lies in its use only of original fabric and accessories from the 50s to the 80s from its own collection, therefore pieces are limited. Ages 2 - 10 years. Styles have a cool retro feel about them (love the above), but are rather on the expensive side to be honest (€120 for a knitted sweater and €75 for a blouse - gulp - don't think I'd let Ruby in the sandpit in those!).
Atelier Assemblé also provide a 'made to measure' service for women, based on retro patterns and where you can select fabric from their collection. Now that I would like to try.