There is not a lot of information here to go on. Are you wanting to do this in Excel or from an external app? What needs to be downloaded - is it a web page, text file, etc...?
If it is a once-off activity, it would be easier to download the file manually, then format it, maybe into a CSV for easy importing into Excel. Then, you can use the
VLookup(...) formula[
^] to find the data that you want to populate your cell(s) quickly. No programming required! ;)