https://www.amazon.com/dp/B075JBBFSL/ref=cm_sw_r_cp_apa_fabc_Vec6Fb7F8AKP7?_encoding=UTF8&psc=1

Took me about 2.5 hours to complete.

You will NEED a special screwdriver kit and a gentle touch. Nintendo makes their screws out of tin foil so be careful

They provide links to show you how to replace it.

https://www.amazon.com/BASSTOP-Replacement-Controller-Electronics-Set-Atomic/dp/B075JBBFSL/ref=mp_s_a_1_3?ie=UTF8&qid=1538771018&sr=8-3&pi=AC_SX236_SY340_FMwebp_QL65&keywords=nintendo+switch+shell&dpPl=1&dpID=51rwYkQf2eL&ref=plSrch

Edit: If anyone ends up buying a set, make sure to use smile.amazon.com and not just Amazon.com

That way a small portion of the sale gets donated to the charity of your choice. Personally, I chose The Electronic Frontier Foundation.