Curve 7 - missing plug

[loops123]

Hey all, bought a second hand skimmer, but there seems to be a missing plug. Any ideas how I can fill/close it? Not having luck finding replacement parts. Perhaps superglueing a cover over it. Thinking it will leave a mess though

Thanks!

 

[TangerineSpeedo]

hole plugs

This may not be the right size but it will send you down the right path.

 

[Submerge]

3D printer and some red tpu and in 30 minutes it will look like it was built with that plug in mind.