Just curious. What companies sell these closed-loop shifters? Haven't been around much lately, but I was wondering if more companies sold them and if the price is more affordable right now.

Closed-loop means the shifter has sensors like RPM, gearindicator,throttlepotentio etc and based on those info it shifts a certain way. This way the shifts should be near perfect.

The only one I could find on google was http://www.geartronics.co.uk/paddleshift.htm , but I know there are more. Anyone know some websites?