you can get the seals at any place that sells bearings and seals or some napa stores can order them just check around, the grease I used was for wheel bearings.I have a friend that just uses STP and swears by it for years says it clings to the bearings and shafts better then oil or grease!!!
I once had a 56 Ford pickup with a loose steering box. I mixed STP motor honey with 90w oil (half and half). Worked like a champ! It really tightened it up.