8/15/2016:
Getting very close to being complete.
Created the center canister from a handiwipes container. Sanded it down and applied base gray paint. 2 Coats. Taped off canister to allow for black rectangle. Drilled in screws. Applied many coats. When I removed the tape, I had a few issues with the paint being pulled off. So I had to re-apply some paint. It is not perfect, but it will do for now. I will apply it to the base of the pack with velcro so when I create a replacement, I can easily switch them out.
Next I worked on the cone portion. I followed Ukswrath thread the best I could. I took a tapered (SpongeBob) cup, cut it per his measurements. Cut sign material for top portion and used a coke bottle cap for the top. For the cone, I made it out of the sign material, and connected to the cup. I will also be connecting this to the base of the pack using velcro, so it can be removed when transporting.
I added the backpack staps and connected the antenna. Below are 2 pictures of the current state of the pack. Still have to add the piece of shoulder strap to it (purchased a heat gun so I could accomplish this). Have some clean-up to do. Will take final pictures when complete so I can get some feedback on the fit.
I appreciate any feedback anyone may have.