Reverse DSML gateway: LDAP queries converted to DSML

Reverse DSML gateway: LDAP queries converted to DSML

I am looking for a way to have a web service make a LDAP query to some
kind of gateway which will then retrieve directory information using only
DSML
Specifically, I have an instance of Horde with IMP and Turba. There is a
directory I want to make searchable through Turba, but it is only
accessible through DSML. What seems like the best solution, if it exists,
is a 'reverse' DSML gateway:
Turba would make an LDAP query to the gateway, which would then convert
the query to DSML. Then the gateway would send the DSML query to the
directory, which responds in DSML, and then the gateway converts it back
to LDAP to give to Turba.
If such a gateway does not exist (Google has given me nothing so far), can
anyone suggest a good web-based interface to search a DSML directory?