Stereo Replacement Question

[DanEZPZ]

Hey,

A few years ago I paid for a new double DIN unit (Parrot Asteroid) to be "professionally" fitted in my E53.

I'm now replacing that unit with a Kenwood DNX9180DABS unit and found out they simply glued the old Parrot unit and facia in place, there is no proper mounting or fitting kit so the unit was just stuck in place.

I'm wanting to fit this thing properly and not just glue it in, however I can't find any fitting kits anywhere for a regular sized double DIN unit.
I have a facia like this but that provides no way to mount it on the car, it's just a surround to fill the gap.

How are regular double DIN units normally mounted in E53s? The only thing I can find is a tray like this but I'd have to wait for it to arrive from Germany and I'm not sure that would solve the issue either.

Thanks in advance