Originally Posted by
16v_paddy
Gripper, Quaife & there's a couple of others that I can't remember off the top of my head as well. Plenty available as they fit all JB & JC gearboxes which are all essentially the same fitment wise right from the R5GTT to the 182 Trophy, which have all been used in competitive motorsport for well over 20 years so not an unusual or uncommon thing to find.
Another thing to consider regarding how the car will be used is the type of LSD to go for. For serious hard track use with big power the plated type diffs such as Gripper will be better suited, but they're more hardcore & brutal in how they work and that might be a bit off putting in a normal-ish road car. If that's the case then the ATB diffs like Quaife would be more suitable