Dune IMAX tickets pre-sale in the US

So I've been extremely excited to purchase tickets for Dune.

I've been checking IMAX sites and searching on the internet for a date they are going to release the tickets for presale for the past month or so.

Am I going crazy? Did it already happen?

I feel like the opening date of October 22nd is close enough now that tickets should be available.

Any information about this would be helpful. I've searched both Reddit, Google, and IMDB to no avail.

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