Here is a website that I have used that links you to the part numbers etc:
2019 Ram 1500 5.7L HEMI V8 Laramie Longhorn Crew Cab Bumper, Front.
www.moparpartsinc.com
Grille has options that you will be able to drill down to select which is appropriate for you Part#13
see the link for more info
The other section on Grilles:
2019 Ram 1500 5.7L HEMI V8 Laramie Longhorn Crew Cab Grilles.
www.moparpartsinc.com
Lights---well not specific but this should get you started:
Shop 2019 RAM 1500 Laramie Longhorn Crew Cab 5.7L HEMI V8 Parts from MoparPartsInc.com in Myrtle Beach, SC, and keep your truck working its hardest.
www.moparpartsinc.com