Even old ones are from Boeing, originally. Could be from a leasing company, I believe Guggenheim, who had the original slots for the 747s TNT now operate, has some 777Fs on order.
Interestingly it looks like TNT is going to end up operating 5-6 different types. I wonder how the economics of having a small fleet with many types is going to work out.
I understand that last year the management was complaining that operating costs were much too high. I don't see this improving it.