I'm looking for a supplier of a type of latching door stop/stay that I
have seen on boats. Without a meaningful name the search is proving
difficult. I'll try to describe the gadget:

The idea is that the door opens to, say, 90deg and comes up against a
bracket level with the top of the door and bolted to the hinge wall.
As it approaches the bracket (and attached buffer) the top of the door
lifts and passes below a weighted latch. This latch drops in front of
the door preventing it from closing. The latch is lifted to allow the
door to close. The bracket looks a bit like a one of the mounts for
an aerial mast IIRC.

Any ideas?

This is intended to prevent the (aluminium) door opening too far and
bending the frame where it encounters the brickwork around the doorway
- guess how I know that this will happen? At the moment SWMBO is in
a sulk because I warned her of the risk 10 mins before she allowed the
wind to catch the door sigh.

There is too great a space below the door for any stops and I don't
want a nasty post sticking up from the patio.

Of course, I will be delighted to read of any better/simpler/more
elegant solutions.


TIA

Richard