This Module is currently available.
An expansion module for the 569 sequencer that adds a lag circuit per row.
The M 569 LE EXPANDER is another companion module to the M 569 sequencer which expands the sequencer’s four rows by four lag voltage outputs (aka portamento). Each row has its own lag rate control as well as switchable on/off/gated mode and switchable lag function for rising or falling edge only or both.
These merchants probably sell this module. Huh?