Never mind, I made it myself from first principles - find attached along with test circuits for LTSpice if you are interested.
Interestingly I discovered various errors in the National Semiconductor schematic provided with the LM301 datasheet - but THINK I have it all figured out now - at least it's performing on the sim as the datasheet indicates that it should.... I fixed it by cross-referencing the various LM301A schematics online and choosing the most commonly found arrangements (as they all slightly differ).
enjoy!