@Finn dAbuzz,
If you'd like to do something like this (not saying you should), I suppose you could use Google Sheets.
On sheets.google.com, start a blank spreadsheet - you can probably just copy/paste over the numbers from your existing spreadsheet. Then, when done, click the "Share" button on the top right; then click the link that says "Get shareable link". Then paste that link into an A2K post. That should make it possible for anyone who clicks it to see it.
The only thing to consider is privacy. I'm not actually sure if people would be able to see the name of the Google account under which you created the spreadsheet. Maybe not? But if so, you'd probably not want to use a google account that has your real name or such in it.