I thought I would try to do something useful Today 
I’m going to compile a list of aluminum parts & suppliers if you’d like to try your hand at making your own proton pack parts.
I’m going to assume that you have access to the proper tools for this project, this is not really a tutorial as much as it’s just to help you locate the accurate metal stock.
I’ll be offering up some measurements that I know for a fact are screen accurate, any measurements that I cannot confirm will be marked with an asterisk (*).
So here goes…
Beam Line & Filler Tube
They are cut from 1.25" (1-1/4) diameter aluminum tubes
They each measure 3.875" (3-7/8) tall.
This is the metal stock that you’ll need
You’ll want to order them cut to 3-3/4" lengths and you’ll have to weld on 1/8" thick lids with a 1.1875" (1-3/16) diameter.
These will then need to be welded to 1.5" (1-1/2) x 1.5" squares (these were not perfect squares on the screen used packs).
The squares are 0.125" (1/8) thick.
EDA Disks
The EDA disks are cut from 1.1875" rods.
They are approximately 0.25" (1/4)* tall (they were not cut perfectly even).
HGA
The HGA’s tube measures:
A: 2.5" (2-1/2) Outer Diameter
B: 2.25" (2-1/4) Inner Diameter
B: 0.125" (1/8) Wall
It is cut to 2.375" (2-3/8) long.
The lid for the HGA has a 2.375" (2-3/8) Diameter and is 0.125" (1/8) thick.
Here is the correct stock
Booster Tube
The outer tube is made from the same stock as the HGA and the inner rod is made from the same stock as the Beam Line & Filler Tubes. Stefan’s plans should be a fair reference for the lengths and angles of the Booster Tube.
The inner plate is 0.125" (1/8) thick and has a diameter of 2.25" (2-1/4).
N-Filter
The N-Filter is made from 3" OD “thin wall” tube.
Dimensions:
A: 3" OD
B: 2.870" ID
C: 0.065" Wall
It should be cut to 3.5" (3-1/2) Tall and has a 3" diameter lid which is 0.125" (1/8) thick.
Here is the correct stock
PPD
A: 1.25" (1-1/4) OD
B: 1.0" (1) ID
C: .125" (1/8) Wall (Thick Wall)
The total height of the PPD is approximately 3.1875" (3-3/16)*.
This part gets filled with resin and then chopped at a 135 (or 45) degree angle.
Vacuum Tube
The Vacuum Tube is made from the same 1.25" OD Tubing as the PPD.
It is 2.5" (2-1/2)* tall and is welded to a flat aluminum disk.
The disk is 0.125" (1/8) thick and has a diameter of 2.25" (2-1/4).
Injector Tubes
A: 1.5" (1-1/2) OD*
B: 1.370" ID*
C: .065" Wall*
The Injector tubes should be cut to 6.375" (6-3/8)
The lid is 0.125" (1/8) thick and has a 1.4375" (1-7/16)* Diameter
The tubes are welded to a 0.125" (1/8) thick plate which is approximately 3.25" (3-1/4) x 1.875" (1-7/8)
This is the stock that I’m assuming was used
Rear Handle
The Rear Handle is made from “Thin Wall” Tubing
A: 1.25" (1-1/4) OD
B: 1.01" (1-1/10) ID
C: 0.12" (3/25) Wall
From the top of the handle where it meets the gun body (at the weld line) it measures 8.5" (8-1/2).
Metal stock
Mounting Brackets
In GB2 they used angles with the dimensions:
A: 1/4"
B: 1"
C: 2"
The pieces were cut to 1" wide as seen below.
In GB1 they were all cut to 2" wide which does not fit well on the bottom of the cyclotron.
My recommendation is to get them all cut to 1.5" Wide as it gives more room for error while installing the rivets and still fits well in the cyclotron area.
I couldn’t find the correct stock at Speedy Metals but if you want to order everything from the same place then this is a good replacement.
Thanks for doing those, I saw them in the new wiki’s that Jack has been playing with and I added a few that I couldn’t find yet. This is going to be a great year for GBFans!