Aerostatic or Aerodynamic is only types I'm interested in. I cannot afford aerodynamic foil bearings at this stage. I can afford aerostatic porous carbon media air bearings but there is no off the shelf bearing I can use without a complete redesign and lots of money spent. It will be cheaper to manufacture a custom set. I am just having a little difficulty locating some graphite/carbon with the correct porosity properties. I am told that this material is produces in Japan and Korea mainly for this type of graphite. The original patent states "nearly frictionless bearings" and this is what I must have to replicate it.