First thing i did mate.
Approached Toko Europe and Toko Japan.
I'm normally pretty good at getting hard to find parts but this one has me stumped. even my contacts who specialise in this sort of thing haven't a clue.
It's an audio LC helical filter and it is a kosher Toko part number.
Have you ever heard of 'in-house' numbers - where a manufacturer orders items from someone else (like Toko) and has their own part numbers provided for it. This could be the case, so Toko can't identify it, as it's not their part number.
Certainly looking that way 'Doh!' thing is we have to get them, but like i've argued if no one has them and no one can get hold of them what do you do?