Based on this product's specifications, here are some alternatives and similar models
Microphone Coupling alan elektronik Midland NC 526 4‑pole for 4‑pole plug and socket
Summary description:
Microphone coupling by alan elektronik for Midland NC 526, 4‑pole design compatible with 4‑pole plug and socket. Provides a reliable electrical connection between microphone and radio equipment, preserving signal continuity and contact stability. Intended for use in radio communication setups and microphone replacements where a 4‑pole interface is required. Easy to install and suitable for field or workshop repairs.