Based on this product's specifications, here are some alternatives and similar models
Sliding handle 1/2" 300 mm EPM E-400-0910
Summary description:
EPM sliding handle, model E-400-0910, with 1/2" connection and 300 mm length. Designed as a replacement or accessory for plumbing fittings, valves or tools requiring a sliding or adjustable handle. Key parameters: 1/2" thread size and 300 mm reach. Suitable for installation in residential and light commercial plumbing applications.