Product Manager System?

Have a client that has a good amount of items he sells wholesale; no ecommerce but wants to generate leads on a product item page etc. Right now we use an image gallery with descriptions and subpages etc and its tiresome but gets the job done. Looking for something more sophisticated with a backend. Any idea’s appreciated! Thanks!!!

If you will not try change theme, you can register new post type for the products and make it a post template that with any custom fields you need.
If you like to change theme, there are lots of themes that with a built-in product post in Themeforest.