Good news, you're in luck. Japanese costume maker Cospatio is selling order-made Neon Genesis Evangelion "plug suits" Eva pilots wear. And boy, they're expensive.
There are order-made Rei Ayanami, Asuka Langley Soryu and Mari Makinami Illustrious plug suits. Each is priced at ¥553,350 (US$6,632) with tax and look way better than the Evangelion wetsuit idol Shoko Nakgawa sported. Shame these outfits aren't seaworthy!