No, these don't exist . . . OR . . . No don't do that?
The latter. (Sorry for being obscure...so often.)
Any d/l of macOS other than directly from Apple would be bootleg and, therefore, untrustworthy (which is not to say that there aren't a slew of people selling apparently fully and honestly functional installers on eBay).
The new Great Equalizer is the SEND button.
In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire