Standalone CKFinder UI with custom connector?

I'm currently working on a project where we'd like to integrate CKFinder into CKEditor to support our Rails application which uses BrowserCMS. I've written a custom connector implementation based on the Server Side Integration documentation which integrates the existing CMS media library (Sections and ImageBlocks). The trouble I'm having is that the CKFinder documentation makes no apparent mention on how to integrate the JavaScript client side interface with a custom connector. We could play some games with URL rewriting but this seems unnecessarily painful. Is there a standalone version of the CKFinder client side component that can be integrated with a custom connector and is there any documentation on how to do this? Thanks.