sweat

Has anyone found a source for sweat adapters that are 1/2” BSPP (also known as G 1/2) male by 5/8” od copper? The difference as many of you know is that the BSPP thread has no taper and the thread is 55 degrees instead of 69 degrees. Someone must make them, but I suspect they do not give them...

I want to connect the copper Hot and Cold lines to a Thermostatic valve. The Thermostatic valve has three male IPS fittings. I will also need a couple of check valves; most I have seen are female IPS to female IPS. Ideally I'd like to use a union, so I can remove the valve if I have too, but...