I understand that you are new to this site so some friendly advice, use the search function before posting. Most times you can find your answer in one or two clicks like I did to find the above thread.
Since your in the UK http://www.nickatronprops.co.uk/ sources good quality parts, we also have a UK supplier for some metal thrower parts. If you can head over to the UK Ghostbusters fan group on FB too, plenty of local GBs willing to help with advice, etc.
I was in the same exact position as you when I first started. Checking ebay and seeing Bob’s packs and almost buying one…
I Googled his name for feedback and found this site. GOOD THING. I found some honest people on this site that love the movie and are productive members of the community. Not blacklisted, thieving, greedy people who only want to make money selling inferior items to unsuspecting fans.
Trust me. You did the right thing by coming here. Everything I’ve used to create my pack was bought from this site. Either from the site shop or members here.
I’ve heard rumours of people not on Facebook before too
The UKGB site/forum is not yet on Tapatalk but we’re planning a big site update soon and Tapalak was mentioned but for now theres plenty of help on here