I was finally able to purchase a Polymer secondary rack spool from Preformed Line Products. A great electric company that I've been dealing with found a new one to sell me. Thought it was neat to see the different styles from the current manufacturers producing these. The only one I can't find id a small 53-1 Polymer spool made by Hubbell/Chance. From left to right: Hendrix in dark grey, Aluma Form in Lt. grey, Hubbell/Chance in black, Preformed Line Products in grey, Hubbell/Chance in grey, Hendrix in Lt. grey. If you have any from other companiesI'd love to see pictures of them. Thanks for looking. Take care to all.