I would recommend using excel to put together a spreadsheet. You can have a column for suppliers you've already reached out to, a column for awaiting replies, a column for ones you need to reach out to, etc. You could color code it based on category as well or other variables that are beneficial to you.
The goal is to start putting them down somewhere, and then you can figure out what is important to you and how to edit the spreadsheet so it has the information you need.
Sample spreadsheet attached.