u/Heavy-Examination72

I am looking to add a bidet here. The problem is with the valve I am only finding the standard 1/2 inch valves.

I can’t figure out where to get the right siize of T valve or even another extension in between. I have been to praxis and they have only standard sizing aa well.

Is there any other place I can find valves? Thankyou. Any advice would be great.