The fenders I post are specific for the Sondors too, I'm sure it can be adjusted or modded to fit other fat tire bikes. You can buy them in polish steel and paint it yourself, or gloss black. The price is much cheaper than Bio O. Everyone on the Sondors Owner on Facebook are getting the ones I post.
Can someone upload pictures of these ali express fenders on their bike? I'm using the http://beaverguardfatbike.com/ fenders and the work well but I'm considering something with more coverage. I have two beaver guards on my back tire and one on the front.