Where to get the best notch 7 & notch 8 sounds for a SD40-2?

CNSD40MRT

CN SD40-2 Fan
Does anyone know where to get the best notch 7 & notch 8 sounds for a SD40-2? Without any horn or bell sounds added.
 
Seeing as we both have been in Indianapolis, your best bet would be on the Washington Street/White River bridge. Passing, I've heard heavy notching-up.
 
Oh, sorry. I'm not exactly a fan of American railways. I've just heard resonating revving crossing that bridge home from work!
 
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