On my old ST i fitted a 57i induction kit, obviously it was removed when i sold it and i got all the bits needed except the cone filter itself (was damaged and i chucked it).
All i want to order is the cone filter but i don't know the product number and the K&N website still hasn't replied. You guys usually have all the answers, cheers.

I suspect it will be as cheap to buy a whole new kit

ill have one for sale on tuesday in v.good condition