Matt
This was the closest manufacture I could find .
As small as them states are up there it's prob. closer than my supplier in TX
http://www.hpbhaydite.com/
Bad
I thought of granite as we have a quarry about 25 miles from here and I use decomposed granite for my road base but all I have ever seen come out of that place was slab or the decomposed ,which it way too fine , dusty and packs like cement . So I guess you can have the right kind of rock close ,but not in the right packaging
Have A Kind Day
Mike