The First Satyr's Spaulders drop from Xavius in the Emerald Nightmare. It also can be listed on the Black Market Auction House.
Here you can buy The First Satyr's Spaulders for EU or US Servers.
Also you'll get guide for receiving The First Satyr's Spaulders
The First Satyr's Spaulders - Xavius Shoulders
Additional budget for Character transfer or Character boost to max level. BMAH Services in Shadowlands now requirement to have a max level character on server, so Trial character will not work.
Free time on evening, if you choose selfplay option