There is apparently quite a vintage clothing scene in Germany, with many niche labels doing a thriving business. This eye-catching dress just came across my Facebook feed. It's $119 (+ $12 shipping), made to measure from LolaBlossom, in Biebesheim (just outside Darmstadt) in Hesse. (Etsy: https://www.etsy.com/listing/181126543/50s-vintage-wedding-dress-white-red). Oddly, it's more expensive from their own website (http://www.lolablossom.com/Basic-Petticoat-dress/uni-color-dress/Wedding-petticoat-dress-white-red::114.html): €139.99, I suspect because that price includes 19% VAT. Neither price includes a petticoat, which LolaBlossom only ships to European addresses.
Sadly, despite it being 100% cotton it is also handwash or dry-clean only. Possibly it's the satin ribbons?
(Reposting this to where bedfull_o_books can actually see it!)