>>5975128This was a fun bit of "recon" to perform while catching up on twitch VODs... This may not be fun for you. Sorry, sir!
Concerning the sailor collar and big red ribbon
>Figma (#028) Hoshimura MakinaMakina has the most prominent combination of them. The angle is more extreme than G3's in this art, but the angle for G3's collar changes in the anime as she moves.
Concerning the buttoned shirt
>see the 5 recent Girls Und Panzer figma They lack the collar+ribbon, but lifting it off Hoshimura looks doable. They have the line of buttons+end of shirt split, but there are pockets down by where G3's belt (probably have to make this part yourself) should be. They're also all short.
Concerning the sleeve and arm design
>Figma (#088) Suenaga Mirai / Figma (#044) Izumi KonataBoth have a similar sleeve shape. Mirai is not short and of a similar size to #028, but has no pre-painted stripes. Izumi is short thus her arms are, but her sleeve size is actually big given the character design and has pre-painted stripes.
Concerning the skirt
>Figma (#147) Hanekawa Tsubasa / Figma (#102) R. Dorothy WaynerightBoth have fairly lengthy skirts. Hanekawa's is the right style with the fringes, but it doesn't meet her knees. Dorothy's style is a lot different, but it goes right up to her knees and is already black.
Concerning the greyish-brown (?) leggings
>Figma (#311) HarunaThis is more of a "if you have her ordered anyway" scenario, otherwise I'm the last person who needs to tell you that you can just paint a figma's legs very carefully.
Concerning the black heels
>Figma (#076) Izayoi SakuyaHaruna also has a nice(r) set of black high heel shoes, though, they each have a beautiful white blossom on them.
Concerning the G3A3 rifle she wields
>Little Armory (LA024) Type 64 Sniper Rifle / (LA020) Howa Type 89They've similar shapes to the real thing, so if you can't hold off for an announcement or find one in any other figure weapon line then these might satisfy you.