Create Custom Post Type extending "Links" type

I’d like to create a custom post type which avoids creating a post single page. That by nature is not a “post” but it can be done with custom post types (as far as I know). “Links” (under “media” in the dashboard) are closer to what I’d like for this type, containing:

• A name
• A URL
• A description
• A category
• A posted date
• An expiry date
• A rating
• A success rate

This is for a coupon database.

I want to emphasize that I know I could create a template which doesn’t link to single pages, but I want a post type which avoids the creation of a single page all together (like a link). I’m trying to avoid creating a plugin which just deals with it’s own table for the coupon DB.