Based on this product's specifications, here are some alternatives and similar models
Mounting Tube BCS BCS-P-IAD52 520 mm for BCS POINT Accessories
Summary description:
BCS-P-IAD52 is a 520 mm mounting tube from BCS designed for accessories in the BCS POINT series. It provides a rigid tubular extension or support point for installing cameras and related accessories, ensuring correct spacing and alignment. Suitable for indoor and outdoor mounting configurations where a standardized 520 mm accessory tube is required.