Just FYI... I am in Seattle and was able to schedule the MCU upgrade for my AP2 Model S with prepaid FSD. I didn't wait to receive an invite. I just scheduled it via the app and mentioned the website shows now scheduling for AP2 cars with FSD. They confirmed I was eligible and said they are ordering the required parts and sent me the invoice to approve as well. $2500+tax total. No labor charges.
Do you have a copy of the invoice (screenshot), where it showes the part numbers?