I built mine out of aluminum, and used the door from an old weapon safe I had laying around. I should say homemade, not custom. I will try to get pics of it soon.

I am interested in that custom lockbox for your pistol. I have seen one that fits under the center console seat, but it didnt say it was mega cab (with the air ducts) compatible, jsut ram 3500. Do you have pics or the product name? Thank you in advance!