Peltier cooler
Hey MADURO_MAS_DURO,
I have had the same problem, and have solved it by giving life to the Frankendor!
I took the top of an active-cool icechest, hooked it up to a thermostat and solid state on/off switch, and insulated the sides of the storage humi I have.
It runs reasonably well, keeps it about 68F and while there is a bit of condensation from the interior heat sink, a moisture barrier and judicious use of towels have solved that problem. If I had some time, a small tray with some oasis would solve that problem nicely.
If you are interested, post and I'l post some pics.
It's not pretty, and you do need to be able to have a surface to the air outside fo the humi which can have a hole chopped in it for this solution to work.