Man, I gave you the cross reference chart. It calls for a heat range 7 in NGK. Look up the stock plug in NGK for that year model engine size. Then put a 7 where the heat range is. There's your part number.
For 5.7 hemi, NGK calls for LFR5AGP. Changing the heat range to LFR7AGP there is no plug of that number. Only LFR plugs with a heat range of 7 are iridium and are $12.99 each.
I'll try other brands and see if i can find something.