I've got a partially built one in the garage, but it was a reissue without the springs. But if you look for a small bag of tiny safety pins that are for sale in sewing shops or Hobby Lobby you can cut the pointy end and head end off and you have the spring left.
I do have some of the springs for another kit I haven't got around to building yet. If I scan them, you can see what I mean about the safety pins.