There isn't a way I know of to get a build list, but there is a way that should tell you if the car came with power steering.
Go here http://www.japan-parts.eu/ and enter your VIN number, it should offer you the choice of a couple of cars, pick the appropriate area (ie if it's a UK car pick EU rhd) that should take you to the cataloue page.
Click the Electrical tab, then select "Switch & Relay & Computer"
Then you to page 3
there you will see various parts of the power steering system, select a part, for example the motor brush if the pop up says Not Applicable then the car didn't have Power Steering.
If you can't get it to work PM me your complete VIN number and I'll look it up in the EPC.