Welcome to the Z. I know on the 1500's 09 - 11 are the same generation, I don't know about the 3500's though. Once you confirm what years are the same you can begin looking on eBay and just using Google and car-part.com.
We have a lot of forums for all kinds of topics, so you shouldn't have any problems finding a place to post questions.
We LOVE pics of Rams.
Here's how to post them: http://www.ramforumz.com/forumdisplay.php?f=73
"A veteran - whether active duty, retired, national guard, or reserve - is someone who, at one point in his or her life, wrote a blank check made payable to The 'United States of America', for an amount of 'up to and including my life.'"