I had no luck finding an original Moto band. This was a nice replacement and has held up well so far. Also has quick release:
Amazon has a brand called Barton on it. Check them out. I love mine from them.
BARTON Quick Release Top Grain Leather - Choose Color & Width (18mm, 20mm or 22mm) - Saddle Brown 20mm Watch Band https://www.amazon.com/dp/B01KD8JCBG/ref=cm_sw_r_cp_apa_6WWgzbG7G7NJG