DMAS and ordering

I own the 8K+ and would like to know about when I can place my order for a DMS. I know I will not be on the top of the list because I’m not a backer. Also when and if I can pre-order. I have spent a lot of time trying to adjust the band that came with it but after time It hurts, The design in all wrong. Love the band for the Rift S that I have to I know that my head pain is not due to using VR for a long time.