For opencart 2.x, get this extension: SuperProducts
frontend demo: http://shop-carts.net/justest/
admin demo: http://shop-carts.net/justest/admin/
using the username: demo and password: demo
After you logged into admin navigate to extension > modules and click edit on Latest / Bestsellers / Specials by manufacturer module
Latest / Bestsellers / Specials by manufacturer module
This module allows you to display modules with latest products and/or special products and/or bestelleres for specific manufacturers.
For each added module you can set what products to display(specials/bestsellers/specials), for what manufacturer to display them , the max number of products to display in that module (limit) the size of the image, the position (available content top and bottom), layout, status and sort order.
Click here to see all my extension