Here's a list of things that are mainly used for the G-Wii build, but are still overall useful. I figured these were worth posting since they still get asked about all the time and could be useful elsewhere. I've provided the part numbers and verified these components can be found by copy and pasting the part number into a Google search.
Speakers(Needed For The G-Wii):
These seem to be pretty universal in the community, but here they are regardless.
https://www.digikey.com/en/products/detail/soberton-inc/SP-1511S-4/6099102
Part Number: SP-1511S-4
(Digi-Key Part Number: 433-1128-ND)
Chonky Headphone Jack(Needed For The G-Wii):
I included the diagram I used to wire up mine.
https://www.digikey.com/en/products/detail/switchcraft-inc/35RAPC4BH3/1288781
Part Number: 35RAPC4BH3
(Digi-Key Part Number: SC1464-ND)
7mm Tact Switches(Useful In The G-Wii):
https://www.digikey.com/en/products/detail/c-k/PTS645SL702-LFS/1146774
Part Number: PTS645SL702 LFS
(Digi-Key Part Number: CKN9071-ND)
4.4mm Tact Switches(Useful In The G-Wii):
https://www.digikey.com/en/products/detail/nkk-switches/HP0315AFKP2-R/2640558
Part Number: HP0315AFKP2-R
(Digi-Key Part Number: 360-2595-2-ND)
Copper Plate For Heatsink & Fan Assembly(Needed For The G-Wii):
You'll need to specify the dimensions of the plate you want to order under "Custom Cut" or else you'll pay for way more than you need. In the case of the G-Wii those dimensions are 70mm x 35mm.
https://www.onlinemetals.com/en/buy/copper/0-093-copper-sheet-101-h02/pid/15247
Part Number: 15247
5 Inch 4:3 640x480 12 Volt Screen(Can Be Used For The G-Wii):
This screen was sold on the Bit Built store and was mainly used in the G-Wii. Data sheet for it can be found
here. Just make sure you mod it for 5 volts.
https://www.good-display.com/product/278.html
Part Number: GDN-D567AT-GTI050NA-08C
35x35x8 5 Volt Fan(Can Be Used For The G-Wii):
I can't say enough good about this fan. It's unreasonably quiet and it gets the job done nicely!
Here's the link for this
Part Number: UDQFNKH01
Everything that went unlisted is either obvious(like replacement GC buttons), or are harder to find. Here are some other cool parts I've come across that may be of use:
3.5 inch 4:3 640x480 Display:
Should fit the G-Boy
https://www.aliexpress.com/item/4000516133188.html
Part Number: JT035IPS02-V0
Here's An Alternative 35x35x7mm 5 Volt Fan
Should also fit the G-Wii, not sure if it's as good or better than the I linked earlier, but I thought I'd link it regardless.
Here's the link
Part Number: ADDA AB3505MX-QB0 3507
Copper Heat Sinks:
These are just a bunch of copper heat sinks of varying dimensions. I'm sure someone will find one of these useful.
Here's the link
Part Number: N/A