Not sure this would work, but:-
go to the website leasing.com and click on the orange coloured box ‘find my lease deal’.
then, scroll down to just-above the car images, and move the slider from All to ‘in stock only’.
There will be the in-stock vehicles – as built, and with the (any) options as fitted.
From there, the leasing company is shown, and can be contacted; so as to find the location of the car.
Bear in mind that unlike a PCH deal, the Motability contract has to be signed in person at the dealers location – twice. (Once to place the order, then to enter the PIN to accept the vehicle upon collection.)