I was gifted a $25 RockAuto certificate and the car was in desperate need of some more neutral handling. A much older post in the Mazda2 suspension subforum, which I can't seem to find, listed a General Motors rear lateral link, part #10409660 which has been discontinued. The New part number #2599016. If anyone can find the original(or poster) please post it so I can give them credit--I have the how-to and the part number, but stupidly did not save the poster's name.
The box. A GM 'murican replacement part, made in China.
The Bar. A couple of things. Rubber bushings on each end mean that this will not be as effective as a fully metal bar. Different size eyelets at each end also mean either buying a 2nd set of bushings for one side, and swapping them in, or just slapping bigger bolts in. I went with the latter option, which I imagine actually causes a slightly different weight transfer rate in a left versus right hand corner. This is a free part, and an experiment. Plus, on an otherwise stock suspension, a few MM more bushing on one side doesn't seem like a lot to worry about. I can give the exact nuts/bolts/washers/spacers breakdown if anyone is interested. Per the original writeup, these were supposed to be 1/2" on each side, but obviously not the case for mine.
The beam before. Very clear where this thing should go.
After exactly lining up the bar(this was actually my first step, before I bought the nuts/bolts), I left it loosely lined up with 2 sharpies, just to clearly show where the holes are, in case anyone wants to put the actual appropriate part on.
After install. My only gripe is that I couldn't find a 7/16" locking nut for the 'narrower' side. I'm checking the car every day, if the nut starts to back off, I'll slap a 2nd one on there with a dab of loctite.
So for about $16 at Lowes, I got this on the car. It plays very well with the stock suspension and wider wheels and tires I'm running. When I first stuck them on, the car stopped feeling like it rotated around the midpoint of the car. Sure the car was grippier, but it didn't really 'feel' the same. With this mod, the car again feels like it's turning around the mid-point of the car. It works for me, for the car, now, but when I upgrade the suspension, it will probably be a bit outmatched.