As far as the tires, I don't know what the problem is. I have just begun trying to find a date that the tires will be back again. I have seen the posts Myron has made. I am also looking into this.
As far as an alternative, I guess making the other 2 tires that are out there for the VTA rim is the option we have. There will be no rule changes, but you gotta do what you gotta do.