Buddy of mine works for a Cummins distributor. They are getting out of transit (and other buses), but I don't know if it's just the distributor or Cummins themselves.

I think so

This is the new Cummins "Variable Geometry" turbo ( The vanes turn to give more torque the more you push it and it is a POS !!!! Before I put a driver on my little truck I had it in the shop and had them put on the new style Jakes and the new Turbo. First one made it about 1100 miles then the next one made it about 2100 miles (some improvment). Had them replace it with a Cummins 444 turbo (one of the highest volume turbos made) and no problems since other than he had to double clamp all the air to air fittings from the turbo to the manifold :) Was blowing them off.