John's was the first ballast I ever used on a layout. Then I discovered that Campbell had ballast products as well, and for me that was perfect. It's not available anymore, so I was in the same situation as you are now.
For several years when we were still in Mobile, I had severe withdrawal as well. The best LHS I was ever in was there as well, but on New Year's Eve 1979, the store suffered severe damage from a fire that started in the business that shared the building. Many of us got together and helped the owner salvage what we could from there. They had in direct loss, @ $750,000 worth of model railroad stock alone. I don't know what the loss for all the other hobbies he sold, airplanes, ships, boats, RC, plastic models, display pieces, craft supplies etc. I bet it was almost $2,000,000. This was a large store!