I haven't seen any for the 68! I tried those 30 led replacement bulbs and they suck. They were dimmer than the 1157.
I like the way the Charger LED taillights light the entire rear of the car. I can score those cheap! Like $10 or $15 each used. For that matter my buddy works at a Dodge dealer bodyshop so maybe get them free eventually. I'm a cheap azz lol....