http://cgi.ebay.com/Power-Door-Look-Conversion-Kit-4-Datsun-240z-240-z_W0QQitemZ5822913863QQcategoryZ60203QQrdZ1QQcmdZViewItem

Anyone know anything about these? They're tempting for the price...

It will still require you to fabricate a bracket to properly support the actuator, and run the wires to the control module. I did this a while back to mine and it was a bit of work. Definately not a weekend project. Oh, and I went with Autoloc.