I have a 2013 C90. I went with a Memphis Shades lowers set-up on my bike. The part number for the mounts was MEK1934. They work on bikes with 69mm-78mm covered forks. I went with the long clear lowers from Memphis Shades (MEM5804) but recall that they also make a shorter one that's a bit wider. I hope this helps.
I actually ordered those mounts and should get them later this week. I am going to go with the 14x5s for sure but I didn’t get them yet in case the clamps didn’t fit. That’s really good news, I’ll surely update my results once I get it a shot. Thanks again!