Also if you want a buttload of the stock NR wire you can order it from here
wires.co.uk : Bare Nickel Wire
the stock wire was .236mm looks like they don't have it but the .274 should work or the .2mm would probably work. These wires do have a little resistance but you use so little it shouldn't effect your resistance by much. Either one would last you half of forever.
I am undecided on which NR wire I like better. I have a bunch of silver wire from COV (not sure which guage) but it is soft and I break it all the time. I never broke the nickel wire but it does have some resistance and can be a little trickier to use.