Longer ron
The problem with buying new gliders is the production rate, the industry is simply not able to generate the airframes.
If you ordered a fleet of 50 gliders I would expect it would take two years to get ten airframes delivered so the only realistic option to get cadets back in the air is to recover the best Viking airframes while looking at a phased fleet replacement.
I think a lot of people fail to understand how small the gliding industry is and that it is not posable to increase production rate ( be it recovery or new aircraft ) because of the lack of skilled staff.