Note(!)
Are you one of those naive and hopelessly optimistic people who, having read the above, enthusiastically starts clicking on titles below, assuming you'll immendiately be able to buy Chaconne scores?
...one moment, not so fast! This is the computer-age. We first have a couple of hoops for you to jump through:

Hoop 1: do you have the plug-in Scorch on your machine? ...thought not.
When you (now less confidently) click on a score below, Sibelius Music will automatically take you to a link which will help you download the Scorch program.

Hoop 2: you're now thinking, "easy, I'll just download Scorch".
Again, not so fast... it'll ask you which 'download-destination' to choose.
Three choices are given - http1, http2, ftp (uuuuh...).
At this point, the fainthearted will give up, hide underneath a blanket, uttering "I hate computers".
Don't! Think about all those juicy scores! What you do is, choose any of the three (so Sibelius tells us)!

Hoop 3: assuming you managed to jump through the previous hoops, you'll now, understandably, be skipping around in anticipation.
Don't! It'll probably not work - at least, mine didn't until I first restarted the computer.