Yesterday afternoon, I added the genuine Mazda mud flaps to my CX-50 turbo premium plus. You will only need to drill one extra 9mm hole per mud flap. The kit provides all the necessary hardware; you just provide the power tools. It's stupid easy. Front & rear sets cost $50 each on mazdaswag.com and other discount Mazda sites.
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Here's what they look like (imgur album below). I know they're not rally style like you asked for, but I like the subtlety of these. I also added the side rocker garnish from the meridian edition. That installation is a bit more difficult since it requires you to cut out a template and then drill five holes into the plastic on the doors (I was nervous about it), but taking your time is key and I think mine turned out really great! I gave it a nice wash afterwards but took the pics pre-wash.
Exterior/Splash Guard accessories for 2023 Mazda CX-50 | MazdaSwag

Here's what they look like (imgur album below). I know they're not rally style like you asked for, but I like the subtlety of these. I also added the side rocker garnish from the meridian edition. That installation is a bit more difficult since it requires you to cut out a template and then drill five holes into the plastic on the doors (I was nervous about it), but taking your time is key and I think mine turned out really great! I gave it a nice wash afterwards but took the pics pre-wash.