Several websites offer these sounds for free, categorized by the "vibe" of the growl:
: Provides a collection of 10+ high-quality sounds, including "strong rumbling," "stomach sounds," and "hunger growls". zhurchanie zhivota zvuki skachat
: Compares stomach sounds to a "whale's song" and provides an archive of various clips. What These Sounds Mean Several websites offer these sounds for free, categorized