All comments and recs below are for the 5. 3 you have (LMG, LC9, etc).
Agree, GM (or Delphi) lifters and trays only, no generics! Lifters p/n 12499225 for a set of 16, about $400. Trays 12595365, need 4 total. Summit, Scoggin-Dickey, Brian Tooley and Texas Speed are legit sources, many others...