Requesting Manufacturer ID

Hi, I work for a company that manufactures a device that produces FIT files. I'd like to request a Manufacturer ID to use instead of the developer value 255.

I gather this used to be done via thisisant.com. There is a form linked from https://www.thisisant.com/developer/resources/tech-support/ but I can't access that even when logged in as the highest level of membership currently available (ANT+ Adopter).

What is the process now that ANT+ Membership has closed?