I'm trying to make a triple-monitor stand using steel plumbing pipe, as I've seen this done by others in the past. Most designs call for 45 degree pipe elbows for the side monitor arms, but this seems to be way too extreme of an angle for my purposes. I've been unable so far to find any other angle sizes of pipe elbows.
They exist, though maybe not in the material you would like
I would go to a plumbing/HVAC supplier and ask.