Chosen Solution

Can the metal end on the side which the slider is attached, be replaced? It holds the other straight end of the zipper to prevent separating of the zipper.

Here’s how: Repairing Zipper Slider Here are guides for other types of zippers: Zipper Repair

Use a small safety pin. If the little loop of the zipper end is still there you can use a small safety pin put it through the loop and close it it will work just like the zipper end that came on it.