Based on this product's specifications, here are some alternatives and similar models
Replacement Blade STANLEY 12-508 for Hand Plane models 12-020/12-220
Summary description:
Replacement blade STANLEY 12-508 designed for use with STANLEY hand plane models 12-020 and 12-220. This spare cutting iron provides a direct fit to the specified plane bodies and restores cutting performance. Suitable for woodworking tasks such as leveling, smoothing and chamfering timber where an original OEM blade is required.