A pro merchant account can create new item pages. It is $40/month to be a pro merchant (though the 99 cent flat closing fee is waived if you are a pro merchant).
http://www.amazon.com/gp/help/custom...1947861&sr=1-1
It is possible that your product is already in the catalog, just without UPC info. So try searching around by keyword first. But if it doesn't exist in Amazon, you easiest option is eBay (unless you do enough selling to make the $40/month worth it)