Sorry to hear about the damage to your RAM, glad to hear no one was hurt!
For the exhaust, I would verify exactly whats damaged to see if you need a whole catback or not and to make sure your y pipe is still good. I would also have the manifolds checked for cracks. With all the manifold issues these trucks have on their own...I would verify they have no cracks in them now.
If you want 5" tips, the MBRP tips are the way to go. Much better quality over the Carven ones. We have them listed here
RAM MBRP 5" exhaust tips for 1500 pickup
gotexhaust.com
If you need a catback we got lots of options there. It just might be difficult to find one quiet enough for the wife. We do have some quieter options as far as aftermarket systems go. Message me to discuss options and pricing.