Here is how I packaged my version of the Steven Hageman Hagtronics "personal network analyzer"

Wish I had taken some pictures of the early stages but I think you get the point.

Starting with a plastic clam shell enclosure I discarded the front and rear plastic panels and cut same size replacements from double sided PCB material.

The front panel was made using my sexy panel technique

Pieces of the shielding were also cut from double sided PCB material to hold the power supply at the rear and sweep PCB at left with two receiver boards,

one on top and other on the bottom. Notice that all seams are completely soldered.   Takes a heavier iron so find a cheap 100 watt one.

After assembling the FAR circuit boards they were placed in their shielded partitions.  The two receiver boards are mounted with four 3/4" #6 screws, with heads cut off , and a pair of nuts on each.  This puts threaded studs in each corner of the receiver board partitions a little over 1/4" long.  The reciever boards are then put in place and fasted with 1/2" threaded spacers.  The receiver board on the top,

and on the bottom.

Cover plates are cut from double sided PCB material, drilled to match the receiver board mounting holes.  This is fastened with #6 1/4" screws to the threaded spacers holding the receiver boards in place.  The bottom cover is identical.

The finished assembly is put in the clam shell box.  And you have a very neat unit at low cost.