Keep an eye on gumtree/here as they pop up from time to time. You missed mine by about 2 months, but There’ll be others.
How much are you willing to spend? There’s always the option of cobbling one together yourself. Both Keg King and Keg Land will be able to set you up with the basics for a few hundred $$$ if you can source a fridge/chest freezer. Grain and Grape also have a great range, and will be able to help as well (you might pay a bit more, but the advice they give is second to none IMHO). The build is pretty easy. If you’ve got a reasonable budget then one of the KK/KL fridge setups with associated gear might be a goer?
JD