Can you create a new "springsecurity-jsf" project to migrate the Acegi JSF components to Spring Security. All you have you have to do is change references from "org.acegisecurity" to "org.springframework.security".
(And change your package names and class names from Acegi to SpringSecurity for completeness).
I did this in a local copy, it wasn't very hard. It would be nice if I could just download an official version instead of keeping my own.