Simplified Testing Equipment/Internal Combustion Engine boxes are still out there. Find one with all the connectors and wires and adaptors. If it isn't all there, don't buy it. If you read the STE/ICE TM, you will be amazed at all it can test. RPM, actual numbers for fuel psi, oil psi, trans psi, engine temp, volts from each alternator, starter voltage drop, etc...
Compared to the OBDII stuff on all 1994 and newer US sold vehicles, it is a gadget. Still usefull though. Figure $300-$400 to collect individual tools, sensors to do the job this thing will do. Not really practical because those individual tools can be used on any vehicle while this thing is just for MV's.