This extension will disable the Add to Cart button for all products that will have or reach 0 quantity and replace it with notify button, and it will put a sold out image over the default product image. Those changes are effective all over the OpenCart, i.e. on every page where there is an Add to Cart button and product image.

Auto send customer email when product is available

You can change the sold out image to whatever image you want, and it will be automatically resized according to the default product image size.

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Multi language support
Drag and drop tickets label
Multi language tickets label
Customize email template
Customize notify text
Auto send subscriber email when product available
Auto reply store owner when customer subscribe product
Only send one email to subscriber
Work in all module and product page
Subscriber manager
Tickets for stock status
Customize popup modal size
Register request to subscribe
100% Responsive !

AND MORE

See Demo
http://dev.opencart-solution.com/oc21/

Admin Demo
http://dev.opencart-solution.com/oc21/admin
Username: demo
Password: demo

Quickly support send email to support@opencart-solution.com