870 timing actuator

[Blott4]

I'm guessing the actuator shaft should not look like this. Looks like there was threads there that hold the redish purple plunger thing but they are now gone. The only reason I took this apart was the truck had a slight skip when idled up to 900rpm and this actuator was leaking i think through the connector. Can these actuators still be gotten brand new or am i going to have to resort to cummins reman?
2005 cm 870 446k miles, 15k hrs bought truck used im assuming these are original they are the older o-ring style seal to ifsm. This is the only one ive taken apart so far.