Based on this product's specifications, here are some alternatives and similar models
Heller knife Heller Klinga Helle Eggen — replacement blade (MPN #K75)
Summary description:
Replacement blade Heller Klinga Helle Eggen (MPN #K75) intended for use with compatible Heller cutting tools. This spare part is a single replacement blade identified by the manufacturer part number and EAN, suitable for maintenance and blade renewal. Use for restoring cutting performance in tools that accept this Heller blade model.