Here is an instant collection of U-1145 insulators used in Australia: $5 each or take the set of all nine for $30 plus actual postage (flat rate box should work well for these).

Top Row, left to right:

R.F.LTD. (Robert Fowler)

FB / 51 (Fire Brick)

WP / 51 (Wade Potteries)

Bottom row:

NPA Made in Australia

Z made in Japan

NZI 1-80 (New Zealand Insulators)

Made in occupied Japan 48

Made in Japan MB 49

KP 72 (Koesters pottery)