Based on this product's specifications, here are some alternatives and similar models
Toilet seat and cover Duravit D‑Code — White, standard fit (model 0067310000)
Summary description:
Duravit D‑Code toilet seat and cover in white, designed for compatibility with D‑Code range toilets. Supplied as a complete seat and lid assembly (MPN 0067310000), CE certified. Intended for residential and commercial bathrooms as a replacement or upgrade, providing a fitted closure for standard-size D‑Code bowls.