I can't really say much from the first 60secs of Pollini's recording of that prelude (courtesy of Amazon.com).
What I actually came across was a digitized early edition of Chopin's sheet music at http://Chopin.lib.uchicago.edu/
, not an original manuscript as I may have implied.
Sheetmusicarchive also has Prelude Op. 45 but I prefer the digitized edition at http://Chopin.lib.uchicago.edu/
. It's the closest thing to having the original, I guess.
Anyway, yes, I plan to study this prelude and who knows, maybe produce a decent recording. But right now, I'm barely through Beethoven's Pastoral Sonata, two Brahms Intermezzi, two Bach 2-part inventions, and two local compositions. I'm also preparing for a semi-public performance of a four-hand ensemble this October. And all of these on the side of a full time job.