barney, that is exactly what I am suggesting. But my guess is finding a Laser rig in good shape and cheap
won't be easy, so you might have to build the entire rig from scratch. This would not be that difficult, if you are reasonably handy and are able to obtain both the tubing and the rig hardware
Laser rig requires no shrouds, the only things that need to be attached to the deck
are the traveler fittings (back by the transom) and the sheet block (in the footwell). To attach these you will probably need to open up the hull (and then close it with inspection
ports), so you need to be very sure where the hardware
will be going first.
(edit: looking at your pictures more closely, I can see a sheet block just aft of the daggerboard trunk, so you may already be all set for that)
Try to buddy up with a local laser sailor to see exactly what is needed... the hardware you will need is really minimal and pretty easily obtained, IMO.
Used Laser sails
are sold all the time on ebay. I assume you have the rudder
and dagger board.
One concern I have is that your boat is a lot shorter than a Laser, and a standard laser rig might be too much sail although the most important consideration is the amount if live ballast you put on the boat and you sailing ability and agility. There are smaller laser rigs available if that turns out to be true.
The other consideration is the balance between the sail and daggerboard centers of effort. If the distance from the mast step to the daggerboard trunk on your boat is reasonably close (eg an inch or two) to that of a laser, you should be ok.