Like said before, queue for HM Flashpoints. You'll be more than geared enough if you buy a few Makeb Vendor Mods, a full set already means you're overgeared for the challange the level 50 HM Flashpoints should present and it's more likely people will be doing those (or better, queue for both!)
Though that being said. A DPS generally tends to have a long queue. Yesterday my friend and I waited 30 minutes for a 55 HM FP before I went to my tank so we had a healer-tank combination instead of healer-dps. I'm getting so bored of tanking though.