First post-hello from Montreal.
Just ordered a new LR ABS disc sensor from an EBay seller I've done business with before for the P5 my gf just bought(hence my registration today on the forum). Haven't received it yet so can't guarantee it's the right one til I have it in my hands (though he cross referenced with my VIN and the stock Mazda part #GE7C-43-72YC) but the Maxima sensor he sent me previously was bang on. Price was $50 + shipping.I'll drop you his contact info via PM since I'm guessing I can't post it here per forum rules.
Cheers.