This Module is currently available.
VCA lin/exp
Simple yet clever – The Grp VCA can work with either linear or exponential characteristic. Thus, the module is equally suitable for processing audio material as well as control voltages. Incoming signals can be leveled before entering the actual VCA circuit. The latter can be opened manually and via two control voltage inputs. One of the CV channels comes equipped with an attenuator. On the output side, there is a normal and an inverted connector available.
http://www.grpsynthesizer.it/index.php/it/prodotti-it/eurorack-grp-it/eurorack-grp-vca-it.html
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These merchants probably sell this module. Huh?