Well Machina_props have a page on etsy; plus he's done a few proton pack builds...the most recent was for someone in Norway!
I have been assured that I'll receive photos at every step of the build along with any changes I'd like to make, so at the very least I'll be able to give feedback on what I see.
Also, he's assured me that prior to shipping, he'll go through everything with both images and video in order for me to be completely happy
He is registered here and I believe his username is machina28 - although I'm not 100%
He's going to be using all electronics hardware from GBFANS, AND OF COURSE THE Mattel thrower/wand.
I don't mind the wand because tbh, it is an official product and is very accurate (although not completely)
He currently advertises his packs on eBay, etsy; and I believe has some videos on YouTube.
Like I said, finding a good builder with great craftsmanship is difficult and even if I have, they are fully booked up with orders!
Bob's shop was a thought, but now I've learnt how he conducts business (even from a personal perspective), then this builder I have chosen appears to be just what I was looking for.
I would've liked BenofKent in reality due to the main fact of import fees, but as he's not available, the guy I have chosen appears legitimately helpful, kind and informative...which is what I require...HONESTY!
We'll see how things proceed; and if the builder gives me permission, I'll be uploading photos here of the build in progress, along with the finished pack!