In the past I have bought original Triumph fairings (expensive). Found this today, seems the quality is ok they are unpainted and undrilled also you have to check tabs. Anyway here it is:- http://www.airtech-streamlining.com/triumph/prodtriumph.html
I'd want to know first if they are compression or injection molded. Injection molded fairings fit better and things like headlight mounts are part of the panel as opposed to been stuck on after so are much stronger.
Scrub that, just seen that the fairings in your link are made of fibreglass. The above still stands though if going for ABS plastics.
They definitely look agricultural, the description I read says, they have fiberglass sticking out the back and need mounts fitted. That said they are less than half price (not counting shipping and these guys seem to be the only ones making them) page 352 http://www.triumphrat.net/sprint-forum/183230-what-did-you-do-to-your-sprint-today-352.html
