Okay Ill update
I received a quote from ryan air, which is more than twice the price that is currently shown for a one person booking on this flight. However, I suppose that if you book 9 tickets (the maximum non-group booking) then want to book the rest of them ,the price will have increased dramatically, so I think it's an acceptable price which we may book.
I also made a request with another carrier (Air Malta), but they did not even respond to my email. So my advice here is: don't try to do a group booking with Air Malta.
I especially called them, and they told me to mail to a certain address (which I hadnt found on the site), but then they don't respond. I guess they dont want to make any money.