Bike shops here get repair parts from large wholesale warehouse distributors, maybe they bought a case of them..
that sort of source should have a right hand Brifter. to supply the local shop. .. ask to have them order one?
10 speed was the newest thing not that long ago..
but you're in UK, not US..
...
Last edited by fietsbob; 08-03-20 at 02:58 PM.