I bought this exact grommet you mentioned previously. If all goes as planned, I am going to swap it out this weekend, so that I will be all set for Carlisle next week.
As for the sender, how difficult is it to bend the fuel pickup? Seems that it is on the opposite side of the tank from the entry point for the filler neck and would have to be removed from the tank completely in order to bend it. The gauge issue does not bother me all that much. Until my fuel leak started, I would just fill it up when it got basically to Empty. It would take about 10 gallons approximately to fill the tank up from E (gauge still reading only 3/4 full though). I believe my tank is an 18 gallon tank, but it has been almost four years since I bought it, so I don't really remember.