One of the things I thought we could do with this group is exchange information on sources of materials etc. I am a fairly recent convert to the world of CBGs so my experience is limited, but I'm sure we all have information that can help others. Even sharing experienced with components. 

So, to kick things off: 

Maplins. In almost every town that I know of. I have used their piezos, 1/4" jack output sockets and volume pots. For these they are cheaper than the best on eBay and comparing quality they seem better. I got an output jack from eBay and the tread was very badly formed to the extent that the nut didn't fit properly. They replaced it but the replacement wasn't great. The ones from Maplins have well cut threads and seem fine. Volume pots are also cheaper. I have compared the piezos with some other ones popular with the CBG makers and prefer the Maplin ones by a small margin. Again, they are cheaper. 

For tools and consumables Wilkinsons is good. Sand paper, steel wool, Danish Oil. All very cheap there. I got allen keys on a large keyring type thing which I think were 99p per set (could be wrong on that, but cheap anyway). So far the fit seems fine and they are strong enough. I got a set in imperial and in metric. 

Just a thought that I had the other day, and someone may be able to confirm or squash this. Finding cigar boxes. Some clubs (golf clubs, cricket clubs, gentlemen's clubs) sell cigars. What do they do with the boxes? This has only just occurred to me but I wonder if anyone else has tried this as a source and did it pay off. 

OK. That's all I have at the moment.