To my knowledge, there are currently no low pin count parts (available in DIP) that will operate from 5 volts, and use BDM. The closest device to meet the majority of your requirements would be the 9S08QG4/8, but this is 3.3 volt maximum. You will need to use flash for your non-volatile data storage requirements.
Regards,
Mac
Hi Rich,
Also the P&E manufactured adapter for BDM is still called Multilink and Cyclone. The main thing I believe you are trying to differentiate between is MON08 with QT/QY and BDM with QG for example.
Regards David