I'm almost done with my (very dodgy) costume. It's basically a dark green boiler suit (very similar to Egon's in RGB). I printed off the GB logo and my surname onto some transfer paper, which I then ironed onto white material which is now being sewn onto the suit by my wonderful gran as I type
My pack is going to be horrible though, lol. I'm making it out of anything I can find really (there's an old Mr. Pop game that's going to be attached somehow) then I'm going to spray-paint it black and add some bits of shiny paper and stuff.
It's a shame my dad got rid of my old RGB proton pack as I could have used the proton gun from that. Still, I found an old toy (the projector gun thingy) which I'll attach to the pack somehow.
Hopefully I'll get some pics up after halloween.