Here is the flap that I decided upon: http://www.ebay.co.uk/itm/350596072603? ... 1497.l2648 and incidentally, the company that is selling it is superb and provided very good service. The flap was a mere £3.99 plus £1 postage.
And here is what it looks like:



The flap is both screwed into place and also bonded with a motor trade polymer sealant adhesive along the inside top of the flap to stop water and mud going down behind it. It also helps it to remain afixed very strongly.
Once and for all I've knocked the mud and debris thing on the head. It looks smart and is really protecting the front underside and radiator very well indeed. I hope too that it may give some protection to the back tyre from nails and screws being thrown up, as happened to me recently.
Just thought I post this in case anyone is having problems locating a good flap. The flap is suitable for mostly any scooter of any size I would think. Hope it helps.
