I had a look at your suggestion and attempted to use it.
It is not a centralized solution for businesses to promote product, its more of a directory that promotes the business, which then requires you to click that business link which takes you to that businesses website, which then you have top search that website for what you are looking for.

Shopper is extremely fast, organized, its helps any business present their business, products or services which they have offer.
You can create your own store, very fast, which every product you add, generates within your created store your own store mini catalogue.
Every single mini catalogue / store, that has a product added, pushes that product into our front facing catalogue so anyone can find what they are looking for fast.

That site is very much a different business model. But an excellent idea to contact inventory management companies!