LT8304-1 Transformator

Dear All

I wpuld liek to built the circuit 1000V/10mA with the LT8304-1 from Design Note DN 1047.

But I don't found any information for the suggested trasnsformator:

Sumida, 0399-T208.

Does somebody has a datasheet or mor information for the suggested transformator?

BR,

FastRabbit