Yes, you have to buy the scope mount either from Taurus or who ever else may carry it.
This is what you need and it comes with hardware. Taurus International Manufacturing Inc
The part # you need based on your description is 10-028, this fits (it says the 44B8 which is a .44 cal, 8 3/8" barrel in blue).
Double check the link yourself or call Taurus and tell them your model # and they'll confirm or get you the correct part#. But the one I gave you should be the correct one. Good Luck.
By the way, I have a Taurus Tracker, in .17cal, for plinking and I bought this mount. It is solid and works great. Most any weaver style scope fits on it. Don't get a scope too heavy though. I originally had a BSA 30mm reddot, which isn't/wasn't all that heavy, but I wanted something a little smaller, so I went with a NCStar D4B 4 reticle reddot sight.