"stlensbar" on e-bay was selling English/Korean-labelled versions of the 87U along with a set of English-only keycaps. All the keys were 55g on the Korean board, instead of the 30g/45g/55g mix on the US boards.
I think there were still two the five left unsold when the sale closed, so you might be able to talk them into selling you one of the remaining ones.
Beware, though: They were asking $300 US (for keyboard and English keycaps) plus a non-trivial shipping fee from Korea.
CORRECTION> $300 US for the keyboard, the English keycap set is an extra $50.