Amazon product custom download script/API for populating product template

I have an Amazon store with about 80 products that were manually uploaded to Amazon seller central. I would like someone to write me a script or API that can access my store and download all products and populate the corresponding fields in the template that Amazon provides for bulk uploading of products. The reason I want to do this is that I want to be able to manage my store through updating the spreadsheet that contains all my products as opposed to manually going into each product and making the updates from there. I have attached a copy of the template that Amazon provides for uploading bulk products, and I have also attached some screenshots from my Amazon store backend to show that the fields in the backend are the same as what I would need to be populated on the Excel template. NOTE: Please refer to the tab called "Grocery Template" on the spreadsheet to see how I would need the fields populated from the Amazon store backend. Please don't submit a proposal unless you have extensive experience with scraping on Amazon. I need this job done ASAP and would like to avoid delays due to someone trying to learn as they go. Thanks!