How many do you need?
In the links I gave above, C-101-5 is probably what you want. Gold plated and about 40mm long, with 6 colour choices.
They are certainly being sold in Akihabara, I've bought heaps. Good quality parts, not like the cheap Chinese ones that are often misaligned and bend easily.
PM me and we can sort something out to get a bunch your way if you want.