Dear A.S.: Happy New Year to you too w(^o^)w!
We don't have any plans to make specialty Atlas models for quite some time, and this would include both an Atlas SL (single-layer low output coils) version and a Mono version.
The reason is simply that we need to supply sufficient quantity of the Atlas stereo version to the market. Each stereo Atlas takes a significant amount of time and effort to make, while a mono Atlas and an SL Atlas would each need to be properly developed before we would consider putting it on the market.
In our experience, a double-layer coil and a single-layer coil behave and sound differently enough that the cartridge should not be built using the same suspension / dampers / tuning. Judging from how much effort we needed to put into the stereo DL Atlas, the sonic development effort for the mono and SL Atlas would take quite some time, and this would reduce our ability to provide stereo DL Atlas' to the market.
This doesn't mean that we won't make specialty Atlas models in the future, but it is still too early to consider doing so yet.
kind regards, jonathan
PS. Put a much nicer photo of the Atlas up on our website. That said, no single photo can convey what the Atlas is like in person. The real thing looks rather different depending on what angle you view it from, and this is inescapable given the asymmetrical design.