I replaced mine with this:
http://www.allelectronics.com/make-a-store/item/con-640/6-conductor-locking-connector-w/leads/1.html
of course, this was when I had to rebuild my HBP from scratch... for the third time... and I happened to have one of those lying around...
ok, well the remix of the remix of that part. You get the idea ;) If you have an original HBP, that part should actually work for you though.
I also used crimp connectors to connect the tail to the nichrome coming out of the HBP. I may have soldered the thermistor connections (the thermistor itself is crimped to a tiny breakout board I built to hold the voltage divider)