I've had one from these guys for 14 years and it still fits perfectly and looks good too. I remember getting very good service from the people I spoke to, I ordered it from their stand at the classic Car Show at the NEC
https://www.specialisedcovers.com There's a good choice of colours, depending on the model of cover, and you can choose "ears" to cover the Morgan's mirrors, contrasting piping, manufacturer's logo and so on.
