I don't know of a final final mod, but the coding for last reply isn't that hard. I've never seen it now work personally. I have helped a few users install it on boards upwards of 20+ hacks and still no problems.
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.