For parts... you're going to need a couple of items to finish the build.
Gorilla Super Glue
3mm Fiber Optic Filament
2.1mm Panel-mount Barrel Connector
Edimax WiFi Dongle (you could use Ethernet... but you're going to have to modify the model)
I bought some neodymium magnets a long time ago... they are 6.5mm square by 2.5mm in height. Since you have the 3D model, you can adjust for this however you like.
I also canibalized a couple USB cables for the female/male connectors... and the male/female barrel bits of an old dead walwart. Alternatively, you could use the male USB part from DigiKey pictured.
An exacto knife, ham sandwich, and three magic beans might also be helpful but not required.
The fastest path to completion for a build will be to print the base and bottom of the berry first. Then, end with the body of the berry. Whilst the berry body cranketh away, you can get the fiber optic in place, place the barrel connectors, slap the USB connectors on, solder like a monkey, and adjust how the Rasberry Pi fits.
One design consideration was how to work-around the massive SD card. I have an adapter that I used to reduce the height of the body. If you make the berry case and send me a picture of it - I'll send you an adapter for free.
Print times are based on a .20mm slice... get it? Slice! It's a Raspberry Pi. Oh... never-mind.
* leaf + stem = 25 mins
* cap = 30 mins
* bottom = 35 mins
* body = 3 hours
* base = 2 hours
* base plate = 30 mins
Here's the model on TinkerCAD. It's fully assembled for display... divide and conquer! Er... print.