I would venture to put in my unasked for two cents here. This is one of those areas of the universe where the law school training won't do to conduct social science research. If this is for a paper, attempting to manipulate the sample into posting their LSATs is going to backfire (not to mention piss them off for being treated like guinea pigs). It may work with witnesses but it doesn't work in research.
Here's the third option: There's a forum for black law school students you aren't aware of where LSAT scores may be posted.
Regardless, I'd check ERIC before trying "field" research. But I'm a 0L.