I just got my unit from B&H Photo, after waiting 2 months.micro Center in the US or CA is your best bet. They keep getting it in and out of stock but if you check every couple days you will be able to get one for in store pick up. I live near Chicago and got mine a week ago.
I would not recommend this router though - I upgraded from AX88U that I’ve been using for 7-8 months now and the 89X is a big disappointment. Has a loud and extremely annoying fan in it that starts spinning crazy from the moment you turn on the router. Also issues with coverage on the 5GHZ network - my Apple TV 4K can’t stay connected to the network during streams where with the 88U I never had problems, issues with iPhone having trouble staying connected to the 5GHZ network as well and less coverage on the 2.4ghz network. Also doesn’t support WPA3 as of fight now.
The AX88U is 100 buck cheaper with the same available features In the firmware minus the 10gig ports but better performer and coverage and no annoying fan!
They indicated that they expected more units in shortly
if you use PayBoo (B&H Store Card) they will discount price to cover tax