An AR EG is one of the simplest circuits to make. All it takes is two diodes, two pots, one cap, and an op-amp voltage follower. Maybe a couple more resistors to trim the output down depending on how large your gate signal is. You can easily build this on one of my MUUB boards.
>I'm in need of several AR-type EGs. Does anyone know of small >boards/kits for such beasts? Tony used to sell some as I recall, but, >well... >