MMS drum diff ??
sold my XLS and sent it out yesterday, i miss it already !
dint have that bit tho, have you tried schumacher ? you never know.
peter had a few bits like this , you could try him at teesside but i THINK someone bought it all and flogged it on... might have some stuff left, i know he had alloy outdrive belt tensioners kicking about, and i got a xls bumper off him