Both Melvyn Rutter and Allon White will make and fit side screen leather panels. If you take a look on their web sites there are photographs of finished panels on cars.
MMC also make this screen leather panels and you can specify them when your car is built. This way the leather is a perfect match, as there may be some slight variations between different batches.
P.S. Jays mine were produced by the factory and you can specify them, though they are not on any of the price lists.
Brian
1970 Morgan Plus 8 - Moss Box (Indigo Blue) 2014 Morgan SP1 (Rocket Red) 2015 Morgan Plus 8 (Rocket Blue)