Old Fork seal! So simple!
I knew I was on the right track with the PVC, but it was just missing the mark. I was going to reuse the old seals because they are still in perfect condition at 11k miles, and keep the new ones as spares. Maybe I'll stop by the local shop and see if I can find some cheap generic seals to cut and use. If not I'll buy a new set of backups because they are cheap.
Thanks for the tips!!