Web site inventory feed to Amazon & eBay listing

I just got inventory feed from a distributor to use on my site and also to be able to load the same items to my eBay and Amazon store. I need an inventory feed file expert to create some kind of file to be able to extract my distributor file to work on my site and be able to use the extract file to list the same items on eBay & Amazon. (Basically to list more items at the same time) Images comes along will be a plus when listing. Need file system where by…when I received inventory from distributor I can just extract into my website csv & also be able to load on eBay and Amazon store. I need this done in week and get update almost every day please?