I have 2 f/r and one centre, Fioroni Tractive diffs for MBX6 or MBX6R
Link to fioroni site.............
http://www.fioroni.com/inglese/prodo...cerca=tractive
with extra side plate things, with different degrees of angle for sale, hardly used at all, been sitting in a box for 5 years.
if anyone wants them,
$120 US delivered anywhere, for all of it
PM if interested