So, it was an mported 20 years ago and is no longer available, if it were available you wouldn't look for more, and you want to know if anyone else has shot it?
1/2" at 50 yards is not "very accurate," it's 1 moa. That's what I'd call ho-hum accurate- at least amount the folks that frequent this forum. Good enough for what I'm doing with a 22, but not earth shattering...