Echo Rug by TRNK
https://www.trnk-nyc.com/collections/trnk-collection-artist-rug-series/products/echo-all-acoustically-correct-area-rug?variant=40345919553610 

The object is single, has logical names of materials and textures
The texture of the carpet is hand-drawn in high quality
The carpet material allows you to flexibly change its colors

For Corona render, it is recommended to install a version not lower than 1.5, since the glossiness of materials is configured with PBR in mind.