Well for MBM AND LCD interface then the easiest is to do something like the gameport setup with 4 thermistors (get some from a digidoc if you need flat ones perhaps). You can push those into MBM5 using a program at
www.benchtest.com and Jim also includes all the spreadsheets and info required to calibrate. Epoxy one thermistor under the CPU core and do a bit of modding to the socket to make a place for the wire.
Then once you have those 4 probes in place and running, just add a serial or parallel LCD and get the numbers from MBM to display on that. I really like Crystalfontz units, but even cheap ones from surplus work fine if you can track down software.