Making Handmade Jewelry is how I started my business. I mainly use Fire Mountain Gems but you should try to google mangnetic clasp and take a look through the different sites to see what's available and about where the best prices are. Keep in mind cheapest cost isn't always the best though. I've never had any issues with FMGs. I was impressed since I received my first order atleast 5 years ago, probably longer, and continue to buy most supplies I need through them. Their orders usually ship within 3 days too unless it's around christmas time. Hope that helps. Jamie