For whatever reason, he sells the blanks and licenses the vent tech to Arakawa. EA is the only shaper I've seen offering their boards. He had his own construction he was doing with it a few years ago "XO" but I haven't seen them pushing it lately. It was pretty expensive and probably not super popular.
I'm with you though. I'd love to find a shaper I could actually work with that offered XTR as an option. I tried that with EA and the machine they needed to use to cut the XTR blanks was out of comission lol

. I'm pretty torn between yoloing the latest big brand rip stick in XTR carbon and working with a shaper I can talk to.
I think FCD also uses XPS foam but I don't think it's from Javis shop? Not sure on that.