Welcome to the Quilting Board!
Have you thought about this company for your brush caps? They will make them custom for you if they don't already have them...
I have never heard of that company. Never run across it on any searches either. Thanks for the link, I just finished emailing them with the same photos I posted on the forum. Here's hoping.
Hope it works for you Joe!
My 1917 Western Electric has that same type of motor that swings around, plus that exact same wooden case. It was made by National and badged for W.E. I saw another identical machine at our guild's quilt show, and it had another name on it, but same machine & case. I think yours' is a slightly newer National badged Mansion.