Based on this product's specifications, here are some alternatives and similar models
Koelner D-TU-71 Bolt-Down Post Support 71 mm
Summary description:
The Koelner D-TU-71 is a bolt-down post support designed for stable mounting of wooden posts with a diameter of 71 mm. This durable steel base is ideal for constructing fences, pergolas, and garden structures. It provides a secure connection to concrete surfaces, ensuring structural stability and protection against moisture for the timber post base.