Travis,
On to the B-2 now, bravo!!
Actually, there's no need investing anything to get various guaged "wire" for your projects, infact, you already have all you'll ever need and possibly ever use; the sprue trees in your kits!
It works really good, and if you're making support cables that need to be taunt, glue each end of the sprue wire where you want it, then after the connections are dry, light a match, blow it out, then immediately hold it about 1/2 inch under the wire..... the wire will tighten beautifully right before your eyes!
Take care,
Frank