I have been toying with the idea of getting one of the cheaper warmer/coolers from Dick Smith (
An Example) or something like that and putting some insulation in my stock center console.
Just gut the cooler/warmer of the important parts and mount them in the bottom of the center console then put a false floor in the console, some spray on insulation (5MM or there abouts) and then have my own mini cooler ready to go. Its not going to get anything supper cold but it could be good enough I think. The down sides to the plan as I see them are the ambient temp from the transmission would mean that it wont get that cold while driving and a drain hole should probably be installed.
That said it is still in my thought process and i have not even looked at the measurements yet.