Mine also appeared to be C/F, but I found a replacement at the Toledo Show that I could guarantee was better quality. It did require some sanding to fit.

You can reinforce yours internally, but to be honest, the wing structure I saw and posted will likely fail before the tube.

New job has me working so much not a lot of energy or time to work at the hobby. Still, asking again if anyone has the elevator linkage bushings sitting in spares.