I just checked the link in the DBMan FAQ and the link provided is working for me:
<URL>http://tangokites.org/dbman/order_mod.txt</URL>
or you can start on this page to view the demo:
<URL>http://tangokites.org/dbman</URL>
It's also available here in the GT Script Resources
# ORDERnary - A simple shopping cart mod.
<URL>http://www.gossamer-threads.com/scripts/resources/Detailed/2265.html</URL>
Hope this helps :)
Unoffical DBMan FAQ
http://creativecomputingweb.com/dbman/index.shtml/