I don't think we have a server at the ASF I can make these available with, so just doing what I can I guess.
https://shibboleth.net/downloads/prerelease/xerces-c/ They're signed with my published key. These are directly from a make dist of trunk. I have not generated or reviewed the site doc output yet so there are certainly some errors left in there. Please report any issues identified here or in Jira. I'll probably try and post a RC next week. -- Scott