Asked a similar question recently.
There are genuine bolts available from the U.S., but expect to pay at least £15.
Part number 90143-07021-00 is what you need.
According to Fowlers, this part number replaced the original 1E8 part.
I can confirm that the length is the same (4"), but it is threaded slightly longer.
Are we completely mad that we are willing to pay over £15 for a genuine bolt for crying out loud!!
