Hey I bought the same EP Hightail California Syrah this year too! I also picked up the EP Hightail Okanagan Chardonnay as well.
The only reason why RJS doesn't sell the hightail in the US is that this is a "quick to market" kit. Basically, they are in the vineyard crushing 1 day, processing it the next, and bagging and boxing it the following day. I'm not sure if it is only 3 days, but I'd say within a week and in very limited quantities. I just think the Canadians snap them all up before they can even offer shipping to the US distributor.