Per this thread on dspace-devel: https://groups.google.com/d/msg/dspace-devel/LhotLr4MSL8/IkZdgTG2CAAJ
Staff at CNRI have kindly volunteered to help us upgrade our (internally distributed) Handle Server to the latest version (v9.1).
We will initially redistribute the Handle JAR via Maven Central (under the "org.dspace" domain). CNRI is working to begin distributing the Handle JAR themselves via Maven Central - once they do we'll switch to using that.
A PR is forthcoming from Ian Little at CNRI.