Populating Products Descriptions for Website - Copywriting Into Excel Only

I have recently finished the building my e-Commerce website and am now looking to populate it with the products I currently sell/stock.

I have exported all the items my business sell into an Excel spreadsheet. The spreadsheet includes product codes and the manfacturer name and item name for each product.

What I require is an item description and seo tags for each item. The item description for most items can be found on the manufacturers website or on alternative websites in the same line of business. There are approximatley 3000 products, not all are unique most are different versions of the same item.

The products are shooting/clothing/outdoor related items.

I have populated a handful of the items myself which I'm more than happy to send over as an example of the work required for anyone who's seriously interested.

In a nutshell this job posting is to copy product descriptions from manfacturer websites or put together a solid description in original words from looking on alternate supplier websites. (I also have a list of alternate suppliers who sell the same items, the wording would have to be different due to copyright).