Is the Ps X arm worth spending getting AN or say Ikeda wire?
it would be worthwhile to have bought the arm that was sold separately, the one supplied on the turntable and a version that resembles the PUA 7 but is not the exact same thing; construction tolerances and bearings have friction different, but perhaps you are already aware of all this.
If it were identical, it would not explain why Samurai electronics on ebay never manages to sell it for some time (a few years)
Now that you have it, fix it without getting too crazy about the choice of wiring IHMO