Technology timelines are commonly used to show how far the human race has advanced in creating inventions. PBS and Wikipedia are two useful websites to try first.
It is not a timeline but it is the best one you can find which I posted in the related links box below.
i cant find one
There are several websites that offer timeline maker software. Timelinemaker is an example of such a website. They claim to offer the ultimate timeline software.
One that I found is on http://www.coldwar.org/
One can find genuine ads for modeling jobs on sites like Kijiji where they have all the information one is looking for like qualification or wages one should expect.
One can find a timeline of the major world events that occurred in the 1990s by going to the Cutting Edge website. The website has information on many decades' important events.
One can obtain genuine college posters from the 'Sports Posters Warehouse'. There one can find college football and sports posters. They can also be found on eBay.
The link points to one. (I don't know how good it is.)
Buy a boot disk. Can't find one? eBay.
You can find a timeline of the Civil Rights movement's history in America by visiting the website called History Learning Site. Wikipedia also has some interesting information.
How you do find a genuine anything? You do research silly. Get in contact with a paranormal society in your state or a local chapter that's closest to you. They usually know where to find one. Or lets see you can always shop around for one. But getting in contact with a PS is your best bet.
There are many places where one could find data and information on different types of timeline software. Many tech magazines and websites, such as PC World, offer information and reviews on various types of timeline software.