UPDATE: I was on hold on the phone with Disney for a bit. The Magic Bands ship via UPS so I had to update address to a physical address, no PO Box. Thankfully it gave me to option to keep the PO Box for my account. He did say that if I didn't want to use a physical address, he would give me the address to POFQ to have them shipped there, but I want them in my grubby hands!
After address was updated, it did let me customize bands at 84 days out. The person I spoke to on the phone said that when they go-live they no longer expect to have the 60 day window for Magic Bands and you can do that whenever you want.
The website, after customizing, does say I can update my Magic Band choices until Jan 4 which is 1 month before arrival!
One more thing done - just have to wait for FP+ now. A bit exhausting for those like me that are planning obsessed.
I was surprised that after I customized my Magic Bands, it came up with my daily itinerary which included dining reservations, so I guess I don't have to link those after all?????