Hi,
Materials from
https://www.cutmyplastic.co.uk/ 5mm Acrylic sheet.
There are other suppliers but this was the only one (I found) that cut a large hole rather than just drilling mounting holes.
Measure VERY carefully and remember that the edging takes a few mm, so for instance the middle hole for my wheel was 160mm but I had them cut a 164mm hole. and similar for the outside just a few mm less than the actual diameter.
The edging trim I got from
https://themetalhouse.co.uk/product-category/edge-trims/edge-trims-edge-trims/ there are loads of other suppliers out there but I found these did them in Blue and hit Buy. Careful to buy the edging suitable for the thickness of the Acrylic sheet!
As ever I have no association with these companies other than ordering my stuff from them.
Happy Hunting.