Pacbrake Broken Lash adjusting screws

I have a 3406b in an 87 peterbilt 359. It has the P-36 pacbrake engine brake and the lash adjusting screws are breaking and the control valve covers are cracked and broken. It seems like it was ran out of adjustment or something but I'm unfamiliar with them. I'm looking for input and or parts. Any help is greatly appreciated.

 

I went into town today and found some replacement lash adjusting screws. They're different than mine yet similar so I'm going do take some measurements and see how I feel about trying them out. I found a pacbrake refresh kit on Ebay for 90 bucks so that's on the way. I also found replacement control valve covers. I'm going to make a small plate to bolt down on top of the covers to add some strength. I'm going to tear them down to inspect and clean before reassembling. I'll keep you posted on my results.