LDAP interface to SQL Server 2000

Looking for a bit of software that will accept an LDAP query via port 389
and convert it to an
SQL query and return the results to the originating LDAP client.

Basically a dialect converter LDAP query <===> SQL query. The originating
LDAP query will come
from an application server.

Anyone know of such a thing.
I searched, but to no avail, most topics deal with how to query LDAP from
SQL Server, but
that is not what I need.