2 Options:
Find someone that has a set of PBS mad 930 flanges with larger splines that will fit directly into the diff gears and buy them. There are fair number of these out there, but will be hard to root out and find them.
Or,
Purchase complete MD diff carrier, gears, side covers, and 930 flanges from us (Weddle). This will result in having smaller MD diff gears (spider and side gears) that are a bit weaker compared to the larger S4/S5 diff gears currently in the PBS.