First of all, thanks to MacGyverr for the original model I use as a starting point. I liked the style they used for the walls of the vent more than any other I have come across.
Here's a lit version of the Die Hard vent ornament. It uses the guts of a tea light for a flickering lit effect (No re-wiring, just pop the top off the tea light). The tea light I used can be found here (NOTE - My wife purchased these a few years ago, so I cannot verify the current ones are still dimensionally identical to the older ones I have).
Printed on my QIDI Plus 4. I used 3 walls with 15% infill (triangles). 0.4 nozzle, 0.2 layer height. Used brand 3dHojor - Metal Silver - Silk PLA, 55C bed, 230C first layer, 225C after. Only support needed is for the mounting holes recessed in from the bottom (I used Tree automatic).
Included is a cut template file. The template is the same dimensions as the model at the height of the photo, trim the photo to the inner edge of the cut template. (Cut template V2 is also now added, this makes cutting the photo easier. If V2 template is printed, cut to the outside of that template.) I backed my photo with foil tape so that light would not bleed through the paper. Had I put more thought into it, i would have modeled the photo background so that John would have illuminated better through the paper. Here is the photo I started with -

Once printed, cut the photo to size (back with foil tape first if desired). Cut the hand with lighter out. Glue hand/lighter to the elevated portion of the background. Glue the “ugly mug” portion of the photo to the background. I glued in the tea light, but if your print is snug enough it may be fine friction fit (one of the two I printed was very snug fitting on the two post). I used SuperGlue (CA glue) on everything. Before gluing in the tea light, i bent the LED down some toward the opening of the hand/lighter.
The author remixed this model.
I added a support free loop for hanging, modeled a drop in mount for a Homemory flickering tea light, and built up the base to space the picture up from the back.