Hi there, we are a small team of audio professionals experienced in composition, production, recording and sound design. We can create the tracks you need in about 3 days. We can make either pure rain sounds but also include random naturally occurring sounds like birds, thunders, traffic, forest, jungle atmospheres etc. We're totally flexible to tailor these exactly as you want it. Thanks for the Spotify example, it is already framing the sort of tracks you're aiming for. Please be in touch and we'd be happy to provide you some examples of our works and drafts for your project.