You can go to a place that has self-service photocopiers and copy the QR code(s) from the export screen(s) to paper that way.
I just tested this using the copy function of my Brother printer/scanner, and my phone was able to successfully import from the printed export code.
I've only got 4 accounts in Google Authenticator (because I only have it because I wanted to help someone else once who was using it figure out something). The more accounts you have the denser the QR code will be, so it is possible that you might have to split the export into multiple passes with this method if you have a lot of accounts.
I just tested this using the copy function of my Brother printer/scanner, and my phone was able to successfully import from the printed export code.
I've only got 4 accounts in Google Authenticator (because I only have it because I wanted to help someone else once who was using it figure out something). The more accounts you have the denser the QR code will be, so it is possible that you might have to split the export into multiple passes with this method if you have a lot of accounts.