I should have followed up on this post long ago , but I can tell you all that Don Trimming based in Erdington ( Brum) were great
They fitted a new Burgundy mohair top and matching cover that fits beautifully.
They advised me to leave they hood up for a few weeks to stretch it , and the only additional work I did was to install some pipe insulation foam over the central rail as the hood “flapped “ at around 40 but disappeared around 50.
To remove the old and fit the new in their workshop took 2 days.