Sold out for this season, but if pendula is what you require why not have Traveller or Cascading Hearts instead. Both are very good varieties and comparatively rare in Europe.
Cercis Lavender Twist has green leaves and pink flowers. Pendula form. Gives 12 months of interest. Can be trained to a height of 3ft up to 8ft and width of 3-4ft. We would suggest you look at Traveller as an alternative as its glossy leaves give an attractive summer appearance, not found in Lavender Twist.