A ranch museum is looking for donations of insulators like this. Can you help?

We are restoring an old ranch in California as part museum and attraction for school childrens field trips, we need to find around 30 to 40 ceramic insulators to complete the simulated poles and wires. We are looking for a specific type, I have attached a picture and the measurements are below. Thank you for any help you can give.

Guy Tanner AVLM Technical Services guytan@gmail.com AVLM.com@gmail.com 310-320-4840 310-766-6023

3.25 inches high 3 inches wide 3/4 inch hole through the middle