Niche Pump screw sizes

[JeepDVLZ45]

I picked up a Niche pump body kit a few months back. It’s back from anno and I’m trying to finish the assembly. Unfortunately the marker didn’t come with any of the hardware for the pump and these are the last bits I need to finish it up

I’m looking for the screw sizes/ threading for….

1 - the two screws (threaded rod?) that hold the internal pump rods to the front plate
2 - the two screws that thread through the back plate into the internal pump rods
3 - the set screw (or roll pin?) that attached the pump arms to the back plate
and
4 - the screw size that attaches the pump arms to the back block

Thanks in advance!!