I heve fitted the subaru windows regulators over a year now and they work good.
The units were after market universal ones and took a lot of adjustments to make a good fit, so I desided not to make a howto.
It needs a little welding to the mounting points, slight bending and shortening the rail, rearange the cables.
If you look around you can find systems with small universal motors that can be used..
Mine were from a Subaru forrester but in France they have used Smart roadstar units if my info is correct.
For the first time since 2012 I have the regulators to work fas en correct.
This is how they work now.
https://youtu.be/tDCaBLr8ay0https://youtu.be/CiXAcr8YXt0