Question: PFF lineup rankings 2013 and earlier?

[KB_fan]

I've been intrigued to discover the series of PFF depth chart updates showing their evaluation (poor to elite) for every team's projected starting line up from the past 3 pre-seaons.  Here are the Panthers charts I've seen:

July 2013 Charts - Panthers & ALL teams [not sure of the exact date, it was posted here at the huddle in July 2013]

August 31 2013 Carolina Panthers Chart

May 16,2014 Panthers Chart

Feb 16 2015 Panthers Chart

June 3 2015  Panthers Chart

Does anyone know if they produced similar charts prior to 2013?  I've been browsing the site and digging on Google, but haven't seen any charts from earlier years.  If anyone has such charts, or can direct me to links, I'd be grateful if you'd post them here, thanks! 

I'd like to do some analysis of how different players' grades and the team's average grade changed over time.

[KB_fan]

Bumping this up because I'm still trying to find PFF rankings similar to their current depth chart rankings and starting line up rankings for the start of the 2013 season [and also for 2011 or 2012 seaons (if those exist)].

The link I had saved for the start of the 2013 season no longer works.  The page shows up, but there is an article title and then the rest is blank.

https://www.profootballfocus.com/blog/2013/08/31/carolina-panthers-2013/

In particular, I'm interested in knowing the PFF rankings (i.e. below average, average, good, high quality...) at that time for:

DeAngelo Williams,

Mike Tolbert

Travelle Wharton.

Thomas Davis

Quentin Mikell

Mike Mitchell

if anyone can provide the links or information, I'd appreciate it.