With regard to gliders, if Schleicher won't play ball, and Grob are out of the glider business, then the Glaser-Dirks could be a good alternative. The company is still actively manufacturing gliders, and when last buil, the DG-505, in its Orion form, was built in Slovenia, so should be rather more affordable than one built by German labour. For an order of 80 or so aircraft plus spares, they may consider restarting production.
https://en.wikipedia.org/wiki/DG_Flugzeugbau#Ownership