I'd advise getting a (Fender-licensed) Mighty Mite 2908 or 2909 jazz neck. THe MM necks are generally better quality than new MiM necks IMO.
They are occasionally available in the UK new via an ebay seller, although not right at this moment. You could get one from the US including all import taxes for about £125 though.
Also, ignore the nut width specs that the "STratosphere" seller on ebay and other dealers may quote for the 2908. It's a 1.5" nut on both the 2908 and 2909. Get a dealer to actually measure one and they will confirm it.