Carlfino - A company called Driessen make most of the meal carts for Europe, suggest you contact them for specs.
If not try De Ster who make the plastic trays etc.
Airbourne Soon - Aircraft galleys can be chilled (the ones with the folding doors) it depends on the spec requested by the airline. Some meal carts have vents in the doors, this is so the chilled air can get into the carts. Sounds like your airline did not request the chillers to be installed.