FYI. Its hard to find something to fit these guys.
I took a chance and ordered the mono m80 based on measurements. Just got it today and its snug but it fits! I probably won't store it in the case to prevent breakdown of the protective padding, but it's totally a good option. My original case is in good shape and now I can preserve it a little. The mono case actually provides more security in my option.
Just thought I would share as I couldn't find any info on this.