[Zope-dev] Multiple file upload in a single form

Has anyone come across a Multiple File field type that be used in a form , specifically with z3c.form? This will enable an unlimited number of files to be uploaded in a single form. I know this exists in the Plone world. Just wanted to check for an analogous field for a zope3 application. If there isn't one there already, we would like to implement one. Any pointers welcome. Thanks. Suresh