It's my understanding that the ng Thomas replica is being built at Strasburg, along with several other standard gauge Thomas replicas. None will be powered, AFAIK, but they will look the part.
Most tourist and museum lines that have hosted Thomas events in the past are clamoring for the replicas, since the Thomas events bring attendance (and revenue) numbers previously undreamed of. At the recent TRAIN/ARM convention, talk in the hallways and lounge indicated that Thomas events alone kept a couple of marginal operations afloat in 2001, and several others said they get as much as 20% of their total annual revenue and ridership from a single "weekend with Thomas" each year.