From what I've heard Powerhobby has good stuff don't think you need to go that high end maybe a 400MG or a 633MCW

As for the horn get a plastic Arrma 25T servo saver or a Hot Racing Metal 25T saver, I think you may need to grind it down though

Arrma Plastic 25T https://www.amazon.com/Arrma-Servo-Saver-Set-25T/dp/B07G3R5LQG/ref=sr_1_2?crid=38FTH9XI0DM5W&keywords=arrma+25t+servo+saver&qid=1683586326&sprefix=Arrma+25t%2Caps%2C104&sr=8-2

HR Servo Saver 1 https://www.amazon.com/Hot-Racing-SHS88H-Aluminum-Vehicle/dp/B00A29B2D8/ref=sr_1_3?crid=B2WOPNVPYR4K&keywords=hot+racing+servo+saver&qid=1683586356&sprefix=hotracing+ser%2Caps%2C99&sr=8-3

HR Servo Saver 2 https://www.amazon.com/Hot-Racing-ATF48SH02-Fixed-Steering/dp/B07MFRMNW2/ref=sr_1_2?crid=B2WOPNVPYR4K&keywords=hot+racing+servo+saver&qid=1683586356&sprefix=hotracing+ser%2Caps%2C99&sr=8-2