Hmmmmm. As far as I know, no one is currently making compressed cedar shafts, not using the Sweetland method anyway. Those of us who managed to squirrel away a few Sweetland shafts over the years aren't parting with them.
May be a few around who run the shafts through dies to squeeze the diameter down a bit. This process compresses the outside fibers of the shaft, though, not the entire shaft. Doesn't work well on Doug fir because of the difference in hardness between winter and summer growth rings. Fortunately, Doug fir doesn't need to be compressed. It's heavy enough and strong enough without it.
Still some good POC around (not compressed) as well, but it's a bit harder to find.