I am looking for the oldest sidur you can find and read online. I mean a scanned version of course. If possible before 1000 Modern Era.
Ps: I am not looking for something in a museum since I want to read in it.
I admit that this is not a precise answer to your question but it may give you hope.
The Jewish Daily Forward carried an article about
AUSTIN, TEX. — A 1,200-year-old parchment Jewish prayer book that is billed as the oldest in existence was introduced Sept. 27 by a prominent private collector of Biblical artifacts.
Full research on the book will be published next year or in early 2015 with the Netherlands-based Brill, edited by Emanuel Tov, a bible professor at Hebrew University of Jerusalem, and Jerry Pattengale, executive director of the Green Scholars Initiative, according to Green.
The Times of Israel has a report about the time the siddur was exhibited in Jerusalem last autumn with a picture of one of the pages.
Its final home will be The Green Collection and its website says that
Guests will be able to experience this collection year-round when Museum of the Bible opens its 430,000-square-foot museum in Washington, D.C., scheduled to open in 2017.