The original: https://www.amazon.com/Godzilla-Sound-Effects-Ifukube-Toho/dp/B00CJ1SA14/ref=sr_1_1?keywords=Sound+effect+of+Godzilla&qid=1562254502&s=gateway&sr=8-1

And just for fun the second album: https://www.youtube.com/watch?v=VaAgFtfal9U

(Yes they made a second one)