Based on this product's specifications, here are some alternatives and similar models
Proxxon accessory adapter for 30 mm disc for WP/E, WP/A, EP/E, EP/A models
Summary description:
Accessory adapter by Proxxon designed to hold a 30 mm disc and fit power tool series WP/E, WP/A, EP/E and EP/A. The adapter enables mounting of small sanding, cutting or polishing discs compatible with the listed Proxxon models, expanding the tools' functionality for detailed work and confined spaces.