Have you tried contacting [url="http://www.bassguitarpartsdirect.com"]Bass Guitar Parts Direct[/url] they appear to carry a large selection of Fender scratchplates and spares.
Have you tried [url="http://www.bassguitarpartsdirect.co.uk/shopdisplayproducts.asp?id=78&cat=Fender+Bass+Bridges"]Bass Guitar Parts Direct[/url] they stock quite a good range of Fender Bridges.