I sincerely apologize for the confusion, I'm not sure how I misunderstood the question so badly.
However, after the fact, I exhausted as many resources as I could possibly find regarding the (correct) topic. Including dozens of "Open" and "Closed" Facebook tickets, with literally thousands of people buzzing in the forums about this exact issue, all to no avail.
I enjoy finding solutions to odd/difficult issues; but I have to be honest and say that I'm beginning to think that there really is just no way to do such a thing anymore. According to Facebook Help, the feature was actually removed recently, which has people very angry with Facebook.
It seems to be very well documented, and I did not find a single piece of information that led me to believe otherwise - including analyzing a huge amount of CSS and Developer console entries in an attempt to prove them wrong.
But with that being said - I have one last suggestion. If you are very desperate to actually get this accomplished, I highly recommend you try one of the following two things:
Automate the process: There is a program that is called "iMacros". There are several different automation options based on your need. This would be the very best (if not only other) option for someone who maintains a group of ~100+ individuals. Additionally, I was astounded by the sheer volume of YouTube tutorials on the subject of using the program to complete similar, if not identical, tasks. I got the program and tested it briefly and it really was quite easy with the guidance provided.
The second option would be quite time consuming if you had a lot of contacts, but if you have a minimal amount, you could honestly just go into MESSAGES and select each member by doing some rapid insertion such as:
Go to "TO" field, and hit "A" followed by "Enter/Return" - and continue to do that until you have exhausted your "A" contacts - so on and so fourth until you reach the end or the limit - whichever comes first.