There is a new Sailor Moon themed boutique in Japan called ‘Girls Love Mode: Let’s Prism Power Make Up.’ While it does not sell much of the clothing from the original series, it does sell Sailor Moon themed clothing that is rather nice, and hey! They sell Serenity’s dress! For more information, visit this link: http://kotaku.com/theres-now-a-sailor-moon-clothing-boutique-in-tokyo-1556759855
That article make you not feel like you are in Japan? Well… here’s a video someone took inside of the store:
NetSenshi Productions 
I’d wear it