I think you could probably find these costumes just by searching around through stores and places like Goodwill and Salvation Army. I don't think green blazers are too common, so that would be more difficult. You could find white blazers and dye them green (I suggest RIT dye), and you could use bias tape for the lighter green/yellow green bits.
Current Projects: Sheena Fujibayashi - Tales of Symphonia
Hikaru Shidou winter angel (Magic Knight Rayearth) // Leia Rolando (Tales of Xillia 2) // Hikaru Shidou red checkered dress (Magic Knight Rayearth) //
Find me on my Facebook page!