This Module is currently available.
Analog limiter
This is a fast controlled VCA with peak detector side chain. Attack time is fixed. There is no make up gain. Set the Threshold to the -1dB point of your A/D converter. Then rise the input until you get the desired gain reduction.
http://www.bereich03-audio.de/mastering_limiter.html
Included in 25 Racks, 15 are public: