Much to my surprise I got an email from the Melvyn Rutter sales department informing me that the spring for the flyoff handbrake (formerly part no CHC105) is no longer available from Morgan.
Unfortunately, springs have come in really many variants. I found this website here
GuteKunst Federn (translated "Good Art Springs") - The catalog is impressive and you can have pretty much any spring made.
If the factory really doesn't supply those anymore - if somebody has the specs for the spring or (much easily) knows where to get one - I would appreciate any hint.
Thanks and Regards
Tim