Only for obstructive legalities and costs of certification people would now be alive. It's an outrage. If I owned a C150 I would cure this myself and to hell with the niceties.
How? I fly a Jodel with an O-200, and carb ice is an almost always present problem - controlled by regular carb heat. As it is EASA 2, it could be modified IF you know of a solution. I believe there have for long been STCs for detectors.