Based on this product's specifications, here are some alternatives and similar models
Cover cap for opening PPZO-SC, No name, model PPZO-SC
Summary description:
Cover cap PPZO-SC by No name is a purpose-made closure for sealing an opening or port. Designed to match the PPZO-SC model, this cap provides a simple mechanical cover solution to protect openings from dust, debris and accidental ingress. Suitable for installation where a matching closure is required for maintenance access or temporary sealing.