Forum:Can't get a pearlescent!

No matter how hard i try i just can't find any pearlescent weapons/equipment! I'm on playthrough 2.5 of secret armory and i've used the floor glitch to loot the armory without time constraints 4 times during "Super Marcus Sweep", i've killed crawmerax by myself more than a dozen times and looted lone lance chests dozens of times. i've yet to see a pearlescent weapon during play or even some of the rarer legendaries (i get nothing but volcanoes, firehawks, unforgivens, equalizers and and defilers from crawmerax, w/ the exception of one orion). i've hit the level cap from the numerous crawmerax fights and have noticed that, especially in the armory, crimson lance chests almost never spawn gear or weapons near my level. have i outleveled some of these pearlescents and legendaries or are the chances of me picking them up really that narrow? thanks for any help on the matter