Metric to imperial part identification?

[SecondCityCorals]

I have a Waterbox and for the most part its great. Although it uses metric in the return line. Metric PVC in the US is....hard to source. Recently I have decided to build a hard line return with manifolds into my sump. I'm using 1 inch PVC. Waterbox sent me these parts to help convert my bulkhead from metric (above sump) to 1 inch (sump side). I am dumb and made a mistake gluing my PVC and need the two parts circled. I know they are Sanking/Flowcolour but I don't know where to purchase replacements. Waterbox has to disassemble plumbing kits from spare aquariums to send me parts which feels wasteful. And I hate having to bug them/waste parts out of a kit when I need spares.

Does anyone know the specific part numbers and where I can buy them?

The hole drilled in the tank is metric sized. I cannot redrill the tank. I am stuck converting metric to 1 inch PVC.

 

[Saltyreef]