A JAR installer for PURL server 1.6.1 is available here. Installation instructions are available in the README. A list of fixed bugs is available in the Release Notes. To install on a headless machine, please see the instructions in the FAQ.
Source code is is available though the purlz svn repository
svn co http://purlz.zepheira.com/svn/purlz
A web view of the souce code repository is also available.
A legacy loader is available to take old OCLC version 1 PURL database dumps and upload PURLs into this project’s RESTful API. This is not production code, but is provided in the hope that it may be useful to operators of old PURL servers wishing to migrate to a more modern PURL server.
svn co http://purlz.zepheira.com/svn/purlz/purlsbulkloader
Check out the code and follow the directions in the file README.txt.