The 2003 MX5 1.8 had the TOCHIGI FUJI SUPER LSD fitted, some of them have problems with the differential friction cone tabs tearing off.
I am trying to find a supplier of parts for this differential. Does anyone know of a source for replacement friction cones or even have any other ideas?
Threw mine away and fitted a Torsen type 2 
I can see your point and I am also tempted, but I like a good challenge and there must be a way of restoring these LSDs.
Mx5 Tochigi-Fuji lsd rebuilt is a video on youtube. The poster Tapio infers that they can repair a ring with broken tabs. Judging by the amount of interest anyone who comes up with an engineered solution or replacement part could make some money
Contact GKN, and they will say no, apparently.
Or see the email contact at:
I wish I could work that fast!
I notice the soft hammer has taken a beating…
I saw the infamous 3 men make light work video. I am not sure an impact driver should be used whilst setting the taper bearings, but hey who am I to say anything I can’t even get the parts to repair one.
I think these guys advertise the repair on ebay but I have not been able to strike up a flowing dialog with them.
They weld the tabs/wings back on.
I always assumed they were hardened steel discs, so welding would remove the hardening. Maybe they are just not hardened?