Checked Cequent family of products and no MaxBrake
Since they also own Tekonsha, wonder why they would have acquired
MaxBrake?
Some corporations will buy a competitor to kill it, but the SEC will
check with a fine tooth comb for violations to the Sherman Antitrust Act
Few will have competing product groups/divisions, but not to say
they don't exist.
Would the OP mind an oblique discussion of the various brands and
their 'sense' mechanism ?
Or continue to look for a MaxBrake controller?
Or both?