Sorry folks, it was Homefocus I was referring to , not Homebase.
I was in both stores the same day hence my confusion being I wrote this post late at night. The cost of measuring and fitting in Hickeys is fixed so no change out of €165 before we even come to cost of the materials themselves. The Homebase stores don't do anything as complex as metal curved rails, probably because the demand isn't there for them. Newer houses in the main, don't have Bay Windows.
I've been into most of the main stores in town and most of them just do straight rails, again I guess because the demand is mainly for straight ones.
I think that Frawley's used to bring their rails to ?? an Ironworks for curving somewhere close to them. I'm presuming they have some toolage for curving metal safely there. Does anyone know any further information on this???