Based on the photo, the seat tube looks a bit more relaxed than the head tube, but the fork blade centerline seems to be steeper even than the head tube. I would pass on it.
OTOH, if you wanted to gamble that at least the frame isn't bent, I have a decent Trek 7xx(?) fork supposedly with Ishiwata tubing, in that color, has reinf. tangs extending from the crown down insides of fork legs, so-so cosmetic condition, that I would offer for not a lot of dosh. It is from a larger frame: steerer 24.5 cm long with 6 mm of thread, so it might have to be cut down and (harder) rethreaded to fit. PM me for more detail.