Based on this product's specifications, here are some alternatives and similar models
Solenoid valve GROHE Magnetventil model 42399000 — GROHE plumbing component
Summary description:
GROHE Magnetventil is a solenoid (magnetic) valve designed as a plumbing component for controlling water flow in GROHE sanitary systems. Supplied as model 42399000, it serves as an electromechanical shut-off or control element for faucets, automated fittings, or other water-management devices. Suitable for installation or replacement in compatible GROHE fixtures to enable remote or timed water control.