Node 0 Door Lock

[steve@xxxxxxxxxxxxx]

After my disaster with a pushbutton door lock...

http://www.ukha-archive.com/ml/ukhad/2004-jul/msg00640.html

I'm looking for something else to lock my node0 door.

What I would like ideally is something you can open without a key, it
doesn't need to be the last word in security just needs to stop my
little'un...

A finished product rather than a project is what I'm after, and
automation is optional :-O

And as always, price is an issue ;-)

Any ideas?

Cheers

Steve