Walthers has provided a photo of the forthcoming Flexi-Van model on their website. The prices have been raised since the initial announcement but we finally have some signs of progress from them. The car is a Mark III car. Interestly they show it with one mail van and one standard van.
http://www.walthers.com/exec/productinfo/932-3921
http://www.walthers.com/exec/productinfo/932-3921