Hi there,
This is Bogdan from Romania.
I'm a mechanical engineer - specialized in the industrial robotic field, 3D designer and modeler (from time to time and some projects I could make the functional prototype too).
I'm doing product design, industrial design, reverse engineering, ideation, etc.
I have over 15 years experience working on various systems/devices across multiple industries, from concept to launch.
1 - pls have a look at this product selling on amazon - https://www.amazon.com/SANIA-TomCat-Ultrasonic-Repeller-Electronic-Deterrent/dp/B0795849ZB/ref=sr_1_4?ie=UTF8&qid=1545251125&sr=8-4&keywords=sania+pest+repeller - my design, molded flawlessly...
2 - in order to be able to design your enclosure, i will need at least the dimensions of the pcb, or even better the 3d model, and to discuss a bit on the features... (i've seen the pcb has no holes, it features some leds, sockets, etc
3 - in this particular case, it is possible to have the same design for both - 3d printing and injection molding (not always possible, but this shape fits...)
we could discuss all the details here...
Regards
Bogdan