> What brand central locking setup did you purchase?

I went with a Commando system - alarm, keyless entry and central locking
from http://www.slickcar.com.  It wasn't that expensive, but a little fiddly
to fit.  On the '85, I couldn't see a way to get the rear hatch working with
the central locking, so I've used that actuator to create a remote trunk
release instead :o)

toodle pip,
--
       Dug Smith         | Stirling Moss:  Calling upon my
(mailto:dug@dugbert.com) |  years of experience, I froze
(http://www.dugbert.com) |  at the controls