Kindly supplied by mike,(dj-shadow 1966), for which many thanks, which does lead to the correct page, unfortunately in my case this led to a pop-up telling me my box could not be ordered online, and that I should ring 0345 454 111
Where after the obligatory 25/30 minutes on hold,
I did finally manage to order my box.
As to the reason for the “round the houses” procedure, I can only suppose that it is to generate more tele sales marketing opportunities.
Sorry you've had difficulties swapping your legacy box over. I would like to look into this further for you. To enable me to do this I am going to send you private message. Please look out for the purple envelope in the top right of your screen.