I have awake the AddOn Availability 1.0.4 to a new Live in osC 2.3.1.
You can with a Switch turn on/off the Traffic Light Availability image for each Product in the Product Configuratin Page (categories.php)
You have 5 categories.phpOptions (text and images)
Warranty Option in categories.php added
You can get the AddOn here:
http://addons.oscommerce.com/info/4948 (Availability & Warranty Manager 1.0.5 for 2.3.1)
http://addons.oscommerce.com/info/8496 (Availability & Warranty Manager 1.0.4 for 2.3.1)
Best Regards
Peter