I'd skip the aftermarket stuff. The heim-jointed Moss ones will be noisy on the street, and the RB ones just plain suck, imho - their design doesn't allow the proper freedom of movement. The stock ones are more than sufficient, even if you're running a big bar.
Why do you need a part # to call Mazdaspeed Motorsports? I've ordered hundreds of dollars of stuff from them this off-season, and not once have I had a part # in hand when I've called.