you have to use ebay nowadays, no two ways about it.
there are not enough shops locally or even customers locally to have specialist shops. likewise there is not enough demand for
British spares so its down to one shop, distributor to arrange a batch to be made, he gets feedback from his 'customers' the smaller dealers, to see what and howmany he needs.
recently I supplied a tacho cable to a customer for his triumph, he owned it from day one, Wassels supplied me with one, customer says its wrong, I contact Burton , TMD and others only to find their stock came from Wassels, have tried to convince him its the correct one as no other complaints have risen up.
In my town we had 3 bike shops now we dont have one or, only have 3 within 6 local towns. my point being ebay has its uses , dont knock it. if in doubt call seller, did this today on a brake part and promissed good conditon and correct fitment. some times you may get faulty parts but the supplier is at mercy of his supplier and quality may drop due to low quantity order.