Here's two variations of Damian Brakel's spacer for v1.0 machines. They're for 3D printing in PP (polypropylene)
PP-SS-SS_79.stl has a 7.9mm centre hight. It is the file he uses for dosing 18.5g in 18g VST
PP-SS-SS_84.stl is a 0.5mm thicker spacer (8.4mm centre)
The files are offered free for personal use.
The files are not to be used for profit, sale or commercial use with out prior written agreement.
If you want to contact Damian, send him a ping on Diaspora or dcamp.
You can find his website here: https://www.diy.brakel.com.au/
Note: these files are designed for flexible material, the centre support is placed for easy printing, so the outer and centre supports print flat on the print bed.
When fitting, the spokes flex to offset the centre, maintaining the natural curve of the shower screen.
They are not intended for use with rigid materials