Thomas,
I guess you don't remember but 6 - 8 months ago, Buddies carried a few of the US Act balls. They definitely were Ebonite balls. They did have combinations of cores and coverstocks that were not made previously here in the US. (Much like Elite balls originally were conbination of Brunswick cores and covers that were never made before.)
They had had 2 different balls. I have not heard of the Broken Arrow series myself. I believe the ones Buddies had had either the "Traction" coverstocks or the "10.7" or 11.x" covers. Can't recall which cores they had. Sorry.
"None are so blind as those who will not see."