I've got an AC unit that is ready for service or replacement and will look into Webasto.
On a related note, why don't I read more about folks replacing water condensed heat pump units like these with air condensed RV type units? Seems like removing as many holes in one's hull as possible would be a good thing. No hoses or clamps or seacock corrosion or strainers or stuck valve to worry about. Finding a place for the condenser is not hard on 36-40 foot boats, or at least not on mine.