I successfully replaced the entire display assembly, microphone, battery and back cover on a Z5 using this guide. It took me just under an hour using a combination of the written guide and the embedded video (the video includes some helpful tips for reassembly). The Z5 in question was purchased in the UK and required a Phillips #0 screwdriver (not a Phillips #1) as mentioned in the tools section at the beginning of the guide. James mentions above that this is a repair guide for a Z5 Premium so perhaps that model uses a Phillips #1.
Lookup your Mac's serial number on a site like this http://www.everymac.com/ultimate-mac-loo... and make a note of the model number (for example, A1278). Then search eBay, Amazon for "Macbook hard drive cable A1278"