Has anyone actually rebuilt a 85 300D vacuum pump?

[Carrameow]

Has anyone out there actually rebuilt a 85 300D vacuum pump?
Yes I did do a SEARCH but found conflicting info. Also just what parts do I order to rebuild one....
My cars vacuum pump is gone, once in awhile it wont shut down and the vacuum locks are sluggish, and I am losing oil..and now I am hearing the stranges sound Larry Bible mentions..
Needless to say the car is down for Repair
I checked Shop Forum for a Reapir Kit and they list a "Valve" kit at $72 and a Rocker Arm kit at $275....Is a 85 300D vauum pump actually rebuildable?
I remeber Steve Brotherton pHD once said parts of it cant be fixed.............