There are a couple of ways to achieve this.

1) The refridgerated bath option: a refridgerated bath such as this  Techne Refridgerated bath with a thermoregulator to control the temperature.

 2) A Standard water bath with a dip cooler: A dip cooler such as this Techne Dip Cooler, combined with a standard  and circulator or thermoregulator. The advantage of this solution is that it can be used with any water bath with a circulator that can control to the correct temperature. The water bath can also be used stand alone for other applications