Apple Products Purchases

I do not think that is available. I've tried before without success, and there is this appended to the appropriate section on the Apple page that Limnos links:

I have learned to print out and file invoices when I order online. I also save all email associated with any web purchases. The printed copies came about when I had an old computer crash and could not recover saved emails.

We can't fix this but you can let Apple know that this is an issue for you with this website feedback link:

Feedback - Apple.com Website - Apple

For items from the on-line store go to apple.com, scroll to the bottom, and click on Apple Store Account. --> https://www.apple.com/us/shop/goto/account