unbound resolving 10.in-addr.arpa

I am at Witt's End.

I am trying to get unbound to serve up reverse DNS for our internal
1918 address space. I have been going hammer and tongs at unbound.conf
to try to make it forward requests for '*.10.in-addr.arpa.' to our
two internal nameservers that are authoritative for the 10.in-addr.arpa
zone.

Someone, *please*, show me the light.

And no, static zone files are not an option at this point. I need
unbound to forward the requests as described. I really don't want
to have to install named just to get this functionality.

Thanks!

--lyndon