The plumbing in my new house is from the 1950s and I need to replace a section of it, a few feet of what I think is size 3/8 inch NPS. I figured this would be a simple matter, but I am completely unable to find this size pipe available in a consumer quantity. It seems like it is only made for industrial purposes? Where do owners of older homes find this type of pipe?
EDIT Apparently my situation is odd (?) so I thought I would add some pictures. You can see that the pipe I am replacing has OD of ~0.68" and the main pipe has OD ~0.88". For reference you can see that a nearby 2x4 measures accurately on the calipers.