new octalink ones here http://www.ebay.co.uk/itm/Shimano-Splin ... 4844498cfc
for the 7410 c/set it was a 103mm JIS, possibly a tad more sepending on the frame as sometimes the 103's didn't give you enough clearance from the inner ring.
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Hi, I have a bottom bracket that may suit, it's italian thread shimano new and un fitted, ultegra i think. here's a picture let me know if you're interested, cheers.