Silent Door Latch Mechanism or Retrofit Kit

Users are annoyed by loud door latch clicks, especially from children closing doors without gently turning the handle. Current solutions involve DIY fixes like WD-40, felt pads, or straps, which are often temporary or don't fully solve the issue. A purpose-built product, either a replacement latch mechanism designed for quiet operation (e.g., with dampening materials or a smoother engagement) or a universal retrofit kit that can be easily installed on existing latches/strike plates to significantly reduce the 'snap' noise, would be valuable. The product should be durable and not impede the door's security or function.