S Drive Throttle Controller @ Supercheap Auto $132.39 for Mitsubishi with super club membership, might be available for other vehicles.
The SAAS S-Drive STC106 Suits:
Mitsubishi Challenger (PB) 2008 - 2016
Mitsubishi L200 2005 - 2014
Mitsubishi Mirage (ES) 2012 - 2016
Mitsubishi Montero (Pajero) 2006 onwards
Mitsubishi Pajero (V80) 2006 onwards
Mitsubishi Pajero Sport (PB) 2008 - 2016
Mitsubishi Shogun 2006 onwards
Mitsubishi Strada 2007 - 2015
Mitsubishi Triton ML 2005 - 2010
Mitsubishi Triton MN 2010 - 2015
After a bit of digging looks like is available on some other STC Models too.
STC101 - Ford/Mazda
STC103 - Holden, Nissan, Alfa Romeo
STC105 - Toyota/Isuzu/Lexus
Also, the prices I'm seeing on the discounted models (including OP's) show as $132.29.