I'd caution you to stick with the OE clutch; I know of one fellow who went through a long, painful, expensive route to try to fix a juddering clutch problem. He had a clutch disc from a 240D in a 300D conversion. A sharp mechanic picked up on it (after three or four tear downs) and recommended the proper clutch (five springs vice four) and the juddering problem was solved.

__________________
Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC