If you're certain its the compressor, i'd get a Denso *new* (OEM) one from RockAuto - change the Condensor at the same time
https://www.rockauto.com/en/catalog/lexus,2004,ls430,4.3l+v8,1426092,heat+&+air+conditioning
I don't believe 2004 is facelift, i think that came in 2005/6 ?