With the help of SP sellacious Addons, you can design your own Product and Category of sellacious.
To use sellacious addons, you need to install SP Page builder. After installing SP Page builder Download Sellacious SP addons from here and install them.
In sellacious Templates Quickstart, SP Page builder and addons are already installed.
To Design your own Sellacious Category/Product detail page you need to:
To assign the design you created to products/categories in sellacious Configure the Sellacious Category Template plugin.