It is too small for either of those walls.Could you post a pic of the whole space those sofas seem too large and crammed into a tiny area.

Google the artist and discover his works sold at auctions such as Artnet.com. No clue if this particular piece was reproduced. Mr. Goose passed away in 2001 from what I read. Alternatively, you can comment on the article and ask the designer where she sourced the piece. Might have been a gallery selling his work or might have already belonged to the homeowner. The gallery might have other works of his you might appreciate. Btw, you’re posting to a user forum made up of decorating amateurs and pros, not writing to Houzz staff directly. :) Hope you find something to your taste. That is gorgeous art in a gorgeous room!

It is a wallpaper, but the website isn't active anymore. I didn't have much luck with the exact one, but this is similar. https://www.etsy.com/listing/971072425/3d-abstract-traingles-wallpaper-mural?gpla=1&gao=1&&utm_source=bing&utm_medium=cpc&utm_campaign=shopping_us_c-home_and_living-home_decor-wall_decor-wallpaper&utm_custom1=k_744eddc564711c38c290bd9c6594d2b6_k&utm_content=bing_319895457_1302921427446871_81432615571304_pla-4585032209645604:pla-4585032209645604_c__971072425&utm_custom2=319895457&msclkid=744eddc564711c38c290bd9c6594d2b6

furniture on natural oak hardwood floors