I think they were Royal Precision Rifle, which no longer exists having been swallowed by True Temper. TT only retained Project X and the other shafts are no longer made.
Any that are available are probably old stock and it's unlikely that all the shaft options will still be obtainable.
I think the Spinner is standard fit on the Mizuno Mpt-11 in the States, we get the TTDG Wedge Flex shaft. So they must still be around in some shape or form.