I have a PLX R-500 Digital Wideband datalogger for sale. The Amuse R1000 front pipe does not have a extra bung welded into it for the O2 sensor and I don't feel like trying to find someone to weld titanium. I'll sell it for $350 shipped. Here is a link for the product info.

http://www.plxdevices.com/R-500_productinfo.htm