Front wheel speed sensor retrofit ideas?

Took it for the first drive today and everything seems to work well. Logged it against the rear sensor and they are pretty much dead on. Super low speeds under 3 mph or so they might be a tad different, but not by much. Saw one or two hiccups in the log over a 20+ minute drive, but not that worried about it. Now I just need to light the rear tires up and see how the system handles it, lol.