Yes, I think there are some others that repeat the scale in the low end. Most of the models you find in music shops arrange the bass end for blow/draw chord pairs and bits.

I like the chromatics for the low bass, and you can play tunes with accidentals and passing tones, without bending to them, but they won't fit my rack, and I need another hand. Maybe I could hook the shifter to a garage-door opener, and do it with a footpedal.