multiple arguments with comment id (cid) not available

I'm trying to create a view that receives several comment ids as an argument, and prints them out while grabbing other data related to the comment. Views and Views Relationships is the best way to do this -- or so I thought, until I realized that there's no way to get views to receive multiple arguments for CIDs. I was expecting something like the NID, UID, or Taxonomy ID argument form, as they both have the checkbox: "Allow multiple terms per argument."

Is there any other way to do this in Views -- or failing that, Drupal? This seems like a pretty common usage example, simple request, and I'm not sure why it wouldn't be already available.

Thanks!