I was the US reseller for Racelogic for a few years, before they discontinued the traction control boxes (and I tried to buy the remainder of their stock). Unfortunately they're extremely hard to find new, although they do pop up used.
There are two configurations you'll see -
RLTC8DIA is the product you want. 8cyl, digital adjuster, with launch control, and designed to use the vehicles magnetic (VR) wheel-speed sensors.
Stay away from the RLTC8DIAW, which is designed to use switches that produce a square wave rather than a sine wave.
Used pricing ranges anywhere from $1000-$2000, depending on perceived rarity. Don't worry about getting the CD with it (software is not super useful) or the harness being chopped up/etc, it's easy to pin in new connectors and the installation is relatively straightforward.
For future reference, here's a link to the manual with wiring diagrams at the end
https://1drv.ms/b/s!Aj0Boq1humv-gax7cS5YeS6tCheyrA