Atari-Midi Archives

Can anyone help me in finding a MidiPlexer (Hybrid Arts) so that I 
can expand the MIDI ports on my Atari STE, working with Hybrid Arts 
SMPTE-Track ?

As I now begin to work with an Axon NGC77SB guitar synth, which uses 
up to 16 MIDI channels for itself, the MidiPlexer would be the tool 
to allow me the full integration into my existing MIDI recording 
setup with Hybrid Arts SMPTE-Track (MIDI-Track) and the other synths 
etc.

Or - does anyone know of an alternative way to accomplish this task ?

Help is appreciated,

Greg