What I did was book the room I wanted (to secure it), then I called customer service, and ask if club orange is available.
It was available, so I got them to downgrade the room to cheapest guaranteed, I paid for club orange, and then selected the room I originally selected. All in the same phone call.
if they say you need to go through inventory, hang up and call again, and hopefully talk to someone who knows what they are doing.
the “chances” the room is selected in the 5 minutes that takes is slim, but I had had alternatives ready just in case.
when I did this, the down grade difference, plus the club orange was lower than the initial room selection.