You are "stuck" with the sounds that are available in the ERR sound packages.
If you could find the sound board from 6-38094 the locomotive in question, you could build up a RailSounds package that would give you the sound. That's the only way you're going to get that exact sound set.
691RS50017 RAILSOUNDS 5.0 / MILW RD HIAWATHA #3 $55.00 Must contact Lionel to order.