Denny,
Fastenal and NAPA both had that 1/8" ferrule in stock. Fastenal also had 1/8 copper refrigeration tubing (by the small roll), and Fastenal required me to buy a pack of 12 but NAPA sold ferrule by the piece (and, had it in stock).
I found the Weatherhead/Eaton part numbers in their catalog and then used that part number on the NAPA website. If NAPA does not have the part in-stock (or, in their on-line catalog), they will usually order it (if you have the Eaton part number).
(Weatherhead) Eaton Brass Products Master Catalog]Brass Products Master Catalog (Note: 7.2 MB)
