Have had the same issue with this dumb fuse...autozone, o'rileys etc say they have never seen this type fuse. Went to the dealership today. Parts guy brought out what he said fits (same as pics posted earlier). I had the old blown one and it is was obviously different. Basically just taller. When I said it was different I was told the fuse he gave me was an updated version. It was $4.00 so I bought it. Not sold on it being correct. In my opinion it does not seat properly in the fuse box.
Thanks for the part number! That will come in handy one of these days as much as I tow!
Have you considered adding an in line fuse on your trailers harness? Use a 15a fuse and it should blow before the funky one in the Jeep.