You could PM claghorn and ask what cloth that is. Hopsacks and serges are generally used for blazers, there must be dozens or hundreds of options.
Pagodas are not my cup of tea. Bit of roping could be ok. Depends what you want to achieve - what I like about Claghorn's jacket, and the one of Vox I just posted, are how relaxed and comfy they look, how natural. Roping to my mind is slightly at odds with that feel, and pagodas definitely so.