I was wandering around a salvage yard a couple weeks ago and saw what looked like maybe a "B" or "C" pipe in very good condition.
It will be a few weeks before I can get back there again, but I would be glad to see exactly what it is. I'll try to get photos.
The fun part is, the yard is in West Central Missouri, not too far from Kansas City. I have no idea about getting the pipe to WA!