WALI Dummy Fake Camera, Surveillance Security CCTV Dome Camera, Indoor Outdoor Cameras, with One LED Light, Security Alert Sticker Decals (TC-W2), 2 Pack, White

Buy a fake/dummy camera and use the body. I have several and they're ideal for DIY camera projects. For example, something like this: https://www.amazon.com/WALI-Simulated-Surveillance-Security-TC-W2/dp/B083XJJ5QZ/