https://nz.rs-online.com/web/p/transformer-cores/1253663
B66358G0000X187 | TDK N87 ETD 29/16/10 Transformer Ferrite Core, 2200 nH, For Use With SMPS...
Buy TDK N87 ETD 29/16/10 Transformer Ferrite Core, 2200 nH, For Use With SMPS transformers, Power TransFormers B66358G0000X187 or other Transformer Cores...