Some years ago we used the air conditioning cart to help cooling down our brakes. I remember being impressed by the powerful airflow. Btw, apparently that didn't make any difference.... after half an hour the brakes still were hot he same. The B734 doesn't have temerature gauges on the brakes, so you can only guess by approaching your hand!...
Cpt Claret, I know, but I think rolling friction heat is negligible if you tow the airplane very slowly if compared to the hundreds degrees already accumulated.
My bet is it's worth a try, towing very slowly the airplane to a more suitable location, ready to stop at the first sign of deflation.
I think what has been done has already been done, rolling friction heat won't make any difference.
I say again, the scenario is not taxying the airplane under engine power, but towing it very very slowly, with passengers already offloaded.