I can't answer your question directly, but I should point out that the A-300-600 does NOT have the same throttle setup as the A-320 series (or 330 or 340, etc). Although they don't look exactly like those on the Boeings, they work the same; that is, there are no throttle "notches", and the throttles move freely. This is not a setup like the 320, where the throttles do not move in full auto - here, they do move when autothrottle is engaged, just like any of the airplanes like the Boeings or the DC-10.
So in actuality, the TCA may not be the most realistic choice, although I'm sure they would work fine. I don't know how much there is in the TCA in the way of the detents that the 320 series have, but they would be irrelevant in an A-300 setup.
The Bravo throttle quadrant with the add-on for the Airbus might look a bit more like the throttles on the A300 than those little china-doll-size boeing throttles that come with it, and that may be a more visually realistic choice....
And the Bravo does not have detents, which is also more realistic.