OK, I obtained a replica MPP flash for my Fett ESB blaster. So I am thinking about anyone who is making one out of a plumbing tube. These are the measurements of the MPP that I took. Length, hole size/placement; oval diameter/length etc. Red lines are the center. I divided the flash into four sides starting from the Top of the flash around to the back (By this i mean how the flash is positioned in the blaster). The circle measurements is the Diameter, and placement lines is to the center of the circle. Anyone else with a real MPP tell me how close I did and this replica is to the real deal. Hope this helps. Oh and please note the drawings are not drawn to scale.
Added two PDF Blueprints drawn in Metric and to Scale