Plastic Enclosure for PIC project?

After completing my little project, I would like to produce it on a mass scale and plan to order some custom made PCBs. They will only be about 1" by 1" circuit board.

Can anybody recommend a company online that can produce a plastic enclosure that will enclose the circuit board to protect it from the elements?

Something simple is all that I need.

Hammond 1551N or 1551Q, etc.
http://www.hammondmfg.com/dwg9.htm

They can custom drill, mill or print to suit.
https://www.electro-tech-online.com/custompdfs/2011/08/9c2pgC3.pdf

Those enclosures look great. Exactly what I need. Thanks!