need uuroute that works for pathaliases with user at host addrs

[Web Dove]

We have pathaliases working using some local nets.  Many addresses
come out in the form "h2!h3!%s at h1".  I found a copy of uuroute.c which
is designed to work from a database that returns a pure uucp address.

Does anyone have code that works with sendmail to map an address
through the database first, then go through the usual sendmail
decisions about how to send to it.