I looked at the alienware too, but ultimately decided on a Foxx hybrid. Super Comfortable, slim, and $40 shipped. Some reviews on the Alienware said it was very thick with the retention spacers.I have heard good things about the Alien Gear holsters. They are only $35-$40 shipped.
http://aliengearholsters.com/index.php/glock-27.html
Cross breed?? No . Save some money and buy a Old Faithfull Holster Kit for 40 dollars and all you have to do is screw it together how you want it to sit on your body and this holster allows to set the tension on the pistol. Roll the leather in your hands to lossen it up