I did a bit of a search, and found that the sender and gauge are matched. That is, the new style (canister) will not work with the old style (float) gauge. There was also some comment about two different types of canister sensors, but could not find any detail on this.
BTW - I just happened to be speaking with my mechanic yesterday, and even the canister style are hard to get.
You can use the search functionality to find some of the specific information.