B&O Form 1 foams

[The Captain]

Hi chaps, B&O Form 1..

anyone know what I can do to replace these foam sections? My Ma's b&o system. Afaict only Form 2 replacements are available.

My brilliant bath sponge cut bits weren't such a brilliant idea! My ears get full of crumbly numnums.

Thanks, Capt

 

[The Captain]

Anyone have any diy ideas at all? (Apart from bathsponge again!). No specific B&O spares available for these.

IE cutting up squares of something foamy & black.

Thanks, Capt