Finding zippers online can be a daunting task. Lots of people keep browsing online marketplace sites such as Ebay to find a specific color or category of zippers they need. Sometimes you get lucky and a seller may have the specific color of invisible zippers you need, but then you may need to shop from a different seller to get the necessary heavy duty zippers for a jacket you need to fix for a customer. You will most likely never get the shipments in at the same time. Sometimes a seller may have run out of stock and may update you too late about it which might delay things even further.
The ideal way to deal with this is to shop for the sewing accessories you need from a single source. Luckily, there are sites like ZipperShipper.com that allow you to shop for zippers from different categories such as invisible zippers, separating zippers, heavy duty zippers etc. With their extensive collection of zippers and color choices, sites like Zipper Shipper will definitely become a one stop shop for any of your sewing accessory needs.