Your asking a lot. No one can properly answer that as there are a few components that can cause free play. Intermediate shaft, steering rack, inner track rod joints and track rod ends.
I know my own vans steering play is the actual rack and not the intermediate shaft. My gut instinct is it will be the rack that has the play. We don't get many transporters coming in, but most have play in the steering. When checked, they have all been in the rack.
Not a very scientific answer for you, but I'm putting my money on the rack at fault!