Within a given XLM-type body style like yours, there are several styli that were/are intended to work with it and give a flat response curve. There's no way to know which exact stylus came with your cartridge body from the factory, but practically speaking, it doesn't matter. When the stylus largely determines the model, whatever stylus you can find that will work becomes the name of the cartridge.
You have an example of the final (and, some would say, best) generation of ADC's cartridge bodies. ADC produced their most advanced styli for it. The problem, as you know, is finding any of them and being able to afford them when you do find them.
To get you started listening to ADC sound, and assuming you live in the US, I'm going to recommend starting with an inexpensive NOS conical, the K8, available in either blue or dark gray. I'm hoping that while you listen to that, this thread will gather in some recommendations from those who've shopped the current market for the higher-class ADC styli, including the aftermarket offerings, and who have experience with them.
^ About $24 shipped from one known-reliable vendor (one you've already contacted, but there are others). Does this sound like the/a way you'd like to go? let us know.
