Searching for replacement for Bibliogram, I found an website called imgsed.com .

It was sufficient to my needs.

One problem was that it seemed to fetch only a few comments of a post.

Here's the website's own About page:

imgsed.com is an online instagram backup tool that helps users save instagram photos through the instagram public API.

imgsed.com can't verify user information, so you need to pay attention to the copyright when downloading photos.

If you do not wish to be downloaded, please submit your information remove account

ETA:

Apparently it has crazy much ads, so use of adblocker is very much advised!