If you can't find a metallic needle, use a top stitch needle. The metallic thread needs a needle with a larger eye. Most joann's, hancocks or sewing machine dealer will carry a variaty of needles. Good luck and have fun!
Oh, and practice on scraps first before trying it on your project. You may have to adjust your tension. Also, use a thread stand or put it in a bowl behind your machine. It needs a little distance to uncurl so you don't have breakage problems.
I've never had a problem using monofilament thread, but metallic is a different animal!