Macro to transpose and reformat for upload

Right now I have an Excel spreadsheet I am using to plan some purchases. I am trying to figure out a way to take my planning sheet and reformat it so it can be uploaded into my system to auto generate POs. The way the sheet is laid out is that all my future dates are in columns going out 49 weeks. and each row is a separate supplier and part number with the quantities being purchased under the date columns. In order to upload it to my PO system I need one row for each date & quantity.

Essentially I am trying to transpose the entire array but cant just use that formula because I loose visibility on the supplier. I have attached a workbook with some sample data. the "export" tab is how I am receiving the information and the "reformatted" tab is how I need it to be formatted for upload.