Does anyone know sources for transformer laminations in EU that will maybe sell by 10s of kg and not 100s or 1000s of kg? I am searching for EI30 - EI48, M42. Thank you!
You can also contact the nice people at UTM (Poland) to check if they can sell you the laminations you want.
As they produce a lot of different transformers they should have a good stock and know good sources for laminations: