It would be best to call D2 and Rocket7 and talk to them directly. I suspect there is an error on Rocket7's WEB site. I doubt they only have prescription shoes available.

I ordered my Rocket7's about a year ago. They are standard with custom footbeds.

Regardless which way you go, you should have a podiatrist make the cast of your feet. If you are just getting shoes with custom footbeds, have a "slipper" cast made. It includes the bottom of your feet -- thus the name. If you intend to go full custom, you will need a full cast of your feet. There are other, cheaper ways to do this -- foam impressions etc., but the results will be much better if you have the casts done professionally. In any case, talk to D2 or Rocket7 before you have them made.