You can talk to brad at Mopac 170st 105 ave. He is pretty good with parts for ram, he has a 12 and getting his 13 soon. There are a few guys that go out to the street legals on Friday nights, I am going this friday if there is no rain.
The weekly Gateway Blvd meet is great, I do it when I'm in town. For performance parts I trust Mopac but you have to be specific with what you need, Brad's the only guy that knows the hemi and even then it's not overly detailed outside of basic bolt-ons.