Have you tried Jersey HD ? Otherwise it'll probably have to be CC or Zodiac etc or an import from the USA.
If I need any of that stuff I generally use Will Burrows 'cos he's only up the road and a decent bloke.
Thanks Dave, OEM is not available. The others are repop. The bike is very original and I like to keep it that way. I really need to find out how long Harley used that part on their bikes and maybe do a search for individual models - early Evos etc.
Marshalls Speed and Custom in Wales can often help but postage can be costly - ask him to use ParcelForce and not another courier and you should be ok.
You will find a stack of bits like that on FB Marketplace in USA ... search ''harley parts'' and get the levers shipped to your nearest mate in the lower 48.