The info on these is also here:

http://www.talkmorgan.com/ubbthreads.php/topics/317303/4

They work very well but the retaining clips do require a bit of work with some long nose pliers to fit them, no easy way round it but worth the effort. How about an old sheet over you and the cowl when fitting the clips? It cuts down their range when they ping off across the garage.