I've just done the first mock up of an airbox for the Indy (zx12) which takes in air direct from the bonnet scoop. As it is at the moment the filter size that would fit in easiest is about 40cm x 40cm which I guess is a bit big really?

Anyone any ideas of a tintop that might have a panel roughly that size? Or alternatively know of any websites that list measurements rather than just codes?

I know ITG (and perhaps others) sell panel foam in sheets that you can make your own from

I bought a sheet of 3-layer filter foam from Pipercross.

It wasn't a stupid price (can't remember what it was exactly).

Pipercross foam is available from demon tweeks if I remember correctly.