Surefire mini L-4 seen here
http://www.vikingtactics.com/lightsmounts_surefirel4mini.html
Mount seen here:
http://www.gearsector.com/view/product/176/
$190 shipped CONUS
Will consider trades to include G17 mags , ammo in 9mm .223/5.56 , or Troy fixed rear BUIS