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I think I share similar sentiments with the rest of the group - if dust in under paint in a frunk panel is that big of a concern to you, all the power to you to reject. I find it a little absurd, but hey, it's not my car! :)
When you go to the order page for your car you will be redirected to a different page which lays out the changes that come with Tesla Vision and an accept button. You can't miss it.
Go to the order page, right click somewhere on screen and click "view source code" or something similarly worded depending on browser. Once on that page press ctrl+f key and search for 5YJ. Your VIN should be there.