Sorry to be completely off topic here as HN does not support private messages or replies to old threads.
A long shot but you may be able to save us countless hours of effort. Over at the OpenJ9 project we're trying to get z/OS testing for our JDK and one of the dependencies is the XML::Parse perl library which depends on libexpat. In [1] you mentioned you worked on porting this to work with EBCDIC. Did you ever succeed? If so are your changes available in open source anywhere?
