Here are three better JD (Jeffery Dewitt) made insulators in the classic light blue glaze from right to left:

U-866 - the smallest of the JD high tension styles $50 (SOLD)

U-753 - Nice double petticoat power style $30 (SOLD)

U-680A - single petticoat power style $20

All insulators in VNM or better (I don't see any issues!) -- Actual postage additional