You lost a $1,500 manual? Yowza, that's a tough break. I'm assuming you're looking for an NTSC copy, right?
If you're seriously in the market for one, NA is the place to check. Other than maybe DP, that's the only site where you're likely to have any luck. Even then, it's going to to be tough to find a willing seller.
I know one owner on NA was selling one a few months back for $1,500 or so. I don't know if he held onto it or not though.
Wow, that's pretty amazing owning a boxed copy. Did you acquire it recently or have you had it for a while? Is it in good shape? Do you have a complete collection otherwise?
Sorry to hit you up with a bunch of questions in a FS thread, but I get so excited over this stuff. I have a large collection myself (including a loose SE), so I appreciate the hunt.
On a note more relevant to the thread, I do know an owner that I believe would be more willing to sell than most others. I'll PM you later in the day with a little more information.
Beags is king of rare stuff. If anyone can find it for you, he can.