I call them back in 2014 when I was getting ready to change out the 5.87 ratio and no one I contacted made a 40 spline 3 series spool.
I will say that I have had troubles with some of their customer service reps in the past wanting to sell me something different that they had in stock that would work according to them
I let one of their female reps talk me into buying 35 spline conventional drag race axles and spool instead of ordering and having them make the 40 spline light weight hollow axles and spool I really wanted for my new top sportsman Dart