I would start by trying to locate the source from the rental staff. I did a google search for it but nothing came up.

This sofa is a style inspired probably from Milo Baughman's Serpentine Sectional which was individual pieces forming the channels. This and other Milo Baughman channel back sofas can sometimes be found on 1stdibs and Ebay but you have to check often. . More commonly you can find sofas and sectionals that give the look, which are called channeled or channel back sofas or sectionals. The size and width of the channels can vary form the shape, curve, or upholstery technique used. The channel can be on the back only or on the back and seat.

There is a sofa with chaise called Langham channel tufted 4-piece Raf Modular sectional both here on Houzz and offered elsewhere. This sofa has the channels but not the curved profile. When looking for used channel sofa sofa/sectionals/modular-sectional you just have to search as not everyone will call them by their proper name.

Hope this will help you find what you are looking for.

Google Non-Stop Sectional Sofa

I hope you find a place where you can try it . We were in a hotel , I think , in Vegas and it was the most uncomfortable sofa ever. The seats felt like you were always sitting in between two cushions I think the blue one shown could be a much better choice for comfort.

CLARICE SMYTH DESIGN - I really love the blue sofa you attached above - can you share the link?

West Elm Work Belle collection