So currently these are the parts I have found that would be required. This is also for future reference for others. Once testing I will let you know my findings:
This is the part I found for the actual buttons that I ordered for testing alone with the Axxess steering wheel interface. The rest are unknown if needed.
Steering Wheel Buttons -
https://www.subarupartsdeal.com/part...Filter=(4=6MT)
Axxess Steering Wheel Interface -
https://axxessinterfaces.com/product...tegory=AX-RSWC
Axxess Directions -
https://metradealer.com/files/aswc/ASWC-1_INST_959.pdf
Screws x 4 -
https://www.subarupartsdeal.com/part...Filter=(4=6MT)
Airbag -
https://www.subarupartsdeal.com/part...ilter=(5=HIGH)
Steering Wheel -
https://www.subarupartsdeal.com/part...n,341_05,34312
Left Column Cover -
https://www.subarupartsdeal.com/part...4318ca000.html
Column Cover -
https://www.subarupartsdeal.com/part...4317ca040.html
Right Column Cover -
https://www.subarupartsdeal.com/part...4318ca020.html