Based on this product's specifications, here are some alternatives and similar models
FEP Film Steel Ring for FlashForge Foto 13.3 — spare part (MPN 20002148001)
Summary description:
Replacement steel ring with FEP film designed for FlashForge Foto 13.3 resin printers (MPN 20002148001). Serves as a consumable for the printer's resin vat or film assembly, providing a sealed surface for resin curing. Suitable for maintenance or part replacement to restore print quality and prevent leaks during SLA/DLP printing workflows.