Like Vinnie,Kahuna,and Shaun , the biggest ones you can get some lead wire or tin, they are sometimes the same for them, but them real small ones your going to haft to go with Joes, and Kahunas suggestion again by going with copper, cause lead or tin don't go that small.
You can do like that or buy everything you need at one place for about 20 bucks, and that is including all the spools of lead wire and tin wire, and a couple spools of .006 copper wire. This should last you a life time.
If you want pm me and I'll look up this place for you to where I bought mine at.
Kerry