Here's another suggestion from Darryl Herschler's web site. The font from his site is Alt Gothic (aka "AlternateGothic2 BT"). Let's do a little comparison, shall we?

I've taken Darryl's suggestion along with Molly's ("Franklin Gothic Demi Condensed") and DE's ("AlternateGotNo3D"), added a couple of my own, and compared them to the X0 capture of the US Definitive LD. "Franklin Gothic LT Extra Condensed" and "AlternateGothicEF No.2" are two fonts I have that look pretty close as well.

I would include "FF Dirty Seven Two" but I don't have it.

The fonts have been spaced to match the LD capture.

http://img481.imageshack.us/img481/1594/subtitles4rx.png

I think AlternateGotNo3D looks the closest out of these. But it still doesn't look like the exact font.

Image updated with DE's font.