Based on this product's specifications, here are some alternatives and similar models
Foam Sheet for Modeling by VALLEJO — Transparent, 1 pc
Summary description:
VALLEJO Foam is a transparent foam sheet supplied as a single piece. Designed for modeling and hobby use, it provides a lightweight, malleable material for dioramas, scenery, and craft details. The transparent colour allows layered effects or use where visibility beneath the foam is required. Suitable for cutting, shaping and gluing in small-scale projects.