I found a decent one on Amazon that has a thermometer - so you can hit any temps you want to, at the cost of having to watch it (worst case you dilute with a bi

I found a decent one on Amazon that has a thermometer - so you can hit any temps you want to, at the cost of having to watch it (worst case you dilute with a bit of cold water if you overshoot). Very noisy though (Klarstein)