Ghillie
Addicted to ArboristSite
Since the fire departments in metro DC, and near many (most?) large cites have ladder trucks that are basically modified boom trucks, this type of equipment would quickly get personnel in position immediately above the trapped climber, much like a bucket truck.
You ask about subcontracting, why not just know one or more equipment rental place in the area emergency services serve and rent the equipment for the job?
In the incident in the article at the top of the thread the piece of equipment that would like of come in handy would have been a scissors jack (like used for changing car tires) to spread the two trunks and free the trapped climber.
And this is not makeshift how?