Based on this product's specifications, here are some alternatives and similar models
Gun Grip Unitech EA660 replacement grip for EA660 handheld scanner (no boot case)
Summary description:
Replacement gun-style grip designed for the Unitech EA660 handheld scanner. Compatible specifically with EA660 models, this grip attaches to the scanner to provide an ergonomic pistol-style hold. Supplied without a protective boot case. Ideal for applications requiring prolonged scanning sessions, warehouse picking, or retail scanning to improve handling and reduce operator fatigue.