This is not a catalog, but a Westinghouse publication on everything involved in the making of insulators. Very well illustrated and interesting! It is not dated but all the articles it references are from the early 1920's. Some sections:

Raw Materials & making clay

Casting and dry process

Glazing and Firing

Experimentation in porcelain mixes (color, absorption, shrinkage, strength, etc.)

Insulator theoretical design

Design & testing of pin type insulators

Design & testing of suspension insulators

An excellent reference! Figure $45 plus actual postage (can be media rate which is very reasonable)