Available as an assembled Module and as a DIY project.
This Module is currently available.
Dual PT2399 delay
Two PT2399 chips roped together in series, one with vactrol control, and 4 different feedback paths.
http://djjondent.blogspot.com/2015/10/delay-no-more-nonlinearcircuits-build.html
http://nonlinearcircuits.blogspot.com/2014/12/new-pcbs-in-stock.html
2 Users are observing this
These merchants probably sell this module. Huh?