I been looking for an inexpensive outdoor enclosure for the last
year now. There are a lot available but what I found them to be is
extremely expensive, especially when buying from a distributor. I went to
my favorite antenna manufacturer in Waterloo Ontario and he sold me the Scepter enclosures.
The are fiberglass or plastic type material and are working very well, but the
problem is to install the motherboard and power supply I need to put feet
on the motherboard and glue it to the back of the enclosure, as shown below.
Scepter Nema 4 Enclosure with ATX power supply

Scepter Nema 4 Enclosure with Morex power supply

Improperly install Outdoor Unit ODU in a Scepter Nema 4 enclosure

The reason it is improperly install is the unit needs to be at
least 5 feet or 1.2 higher than the chimney. Currently the connection
between this node and the other mesh node has 120 signal strength. So I'm
in no rush to reposition the unit!
My new ODU Enclosure are manufactured down the street (I
really embarrassed about this because I was searching around the world) and the
sales guy came to my house and drop off the units with in 24 hours. What
service! But in my defense the name of the company and the listing in the yellow
pages did not correspond to these types of boxes. They were billed under
switch and fuser assemblers.
The blue arrow indicates a lip and 4 holes on each corner
ready for mounting. No extra feet required.

These new units are less expensive and have a non metallic
backing plate. I will be building two units. Both units will have
200 mW radio cards.
This is a shot of the bottom unit with plate.

Example of EPIA- V with ATX power supply not bolt in.
Notice that power supply is sticking out of the top of the enclosure

The top has 3 inch overhang with a rubber seal membrane for
water proof.

I've shown two types of power supplies. I use regular
ATX power supply for two reason.