They were limited. The trucks with the iForce engine were released first, then the Trail Hunter and TRD Pro, and then the rest of the line up with the iForce Max (hybrid) configuration. I don't know the exact date they started shipping vehicles w/the iForce Max but it wasn't until later in the production year. I doubt there will be many used on the market for some time. I've only seen a couple Tacomas in my area (PNW) that have that configuration, let alone Sports.
There are at least a few folks here on the forums who have a Hybrid Sport, self included.
I can tell you that mine was originally a custom order for one of the employees at the dealership, but they bought a different colored one that came in first, so it went up for sale on the lot. It was the only one in that configuration I saw when I was purchasing.