Allsky Camera - Gasket - 4" Diameter Dome

I needed a gasket for the SUPREMETECH Acrylic Dome/Plastic Hemisphere - Clear - 4" Diameter, 1/2" Flange with Pre-Drilled Holes I purchased. 

I printed the gasket out of TPU and it worked great.

TinkerCAD file added if you want to modify for your own use.