I know the odds are slim anyone even sees this post on such an old thread :/
But is there any chance there a PS3 version of an updated roster for NHL13?
So far, I've only been able to find roster updates for Xbox 360 :/ The most recent update for PS3 I've been able to locate is only updated to the 2013-2014 playoffs
Since you’ve been able to find Xbox rosters, you may be able to convert them. I’m not an expert but I believe you can. I found a video that might help you in a conversion (it uses NHL 14 as an example)