Book Depository has free shipping and there're lots of titles to choose from! https://www.bookdepository.com/search?searchTerm=sound+book&search=Find+book I've purchased a similar sound book - Little Red Riding Hood which my dad and daughter love using from a book fair. The supplier is Junior Page, but the sound books are out of stock and will only arrive in two months.
Kinokuniya Bookstore has plenty of those books! Try the bigger outlet at Ngee Ann City for a bigger selection. Alternatively, you can place an online order on their website. Here is a link to one of those sound books that you can purchase on Kinokuniya's online store. It is called, "We are going on a bear hunt": https://singapore.kinokuniya.com/bw/9781406357387
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