Tim, Librands are selling them on offer at the moment. They are not cheap though, as is nothing Morgan really!
I'd go with the real thing as when you acquire one you will see just how structurally sound they are, they are not easily misshapen!
You will have to micro adjust it to get a good fit for your car. Use a piece of hardwood with a saw slot cut into the end about 2" long and you can then slot it onto the grill and manipulate it into the correct shape.
Before you start trying to trial fix it wrap the whole outside edge in Duct tape this prevents the sharp edge wire scratching the paint! Rip the duct tape down the centre so its narrower and fold it over the edge, sticking it to itself between the wire ends. when finished and installing just pull the tape of the edges, comes of quite easily as long as the applied tape is only half width. Then enjoy! As far as I am aware the mesh inserts came about as road going cars got faster and tended to throw stones out like bullets, radiators started to get damaged so the mesh option was made available. remember a replacement rad is around £600! I have also been told that it was for showing race numbers on competing cars but I'm sure thats toot!
Just as an aside, make sure your insurance covers windscreen replacement full cost as that will set you back £2000 at a dealership. Insurers often put a max limit on screens and with an uninsured excess you can often only get about £250-ish towards the cost. Insurers who understand Morgan's are usually the best option here.
