I was emailing with PPM staff today and found this info out, too. Volunteers at the finisher shirt tent (Marathon day) seemed to be under the impression packets would be sent in October, so I asked.
I cannot express how disappointed I am! I know it's not about the swag, and I know it's really a trivial thing, but Doubling is a pretty big deal!
I was really, really looking forward to wearing my shirt with serious pride (especially because I sacrificed my time by a LOT to help two other people finish the Marathon since they were flatlanders, struggling a bit, and it was their first time).
Anyone want to go in on making our own?