I have a spare DSP B servo as I bought a couple when my DSP B roll servo failed, not sure they are different between pitch and roll as I have seen 8100-06, 8100-34, and 8100-076. I happen to have a 8100-34. Your picture looks like the newer version with the locknut bellcrank retainer versus the earlier screw and clip, my spare unit is the older version if that is an issue. Will sell for $275 plus US shipping?
Figs