zippers

I was all set today. I finished Mr N's cape and I was going to try sewing a zip. I have never tried it before. I watched a couple of you-tube tutorials first and decided I would make a little simple purse out of an old tie. Had it all organized.... No zipper foot! It has either been misplaced or I never had one in the first place. I have an old Husqvarna, I think 70s model. I have no idea how to go about searching for one. I have Googled it but no luck yet. I don't even know if they are made specifically for that model or if they are universal. Really, I am a novice. I can thread it, I can sew straight, zig zag and button holes and that's about it. I am determined to learn more, if only to teach my daughter.