Take a look at the capacitive senders; fewer moving parts to go bad.
Two items to check (as far as I'm aware, and I'm no expert on these things): The resistance swing between empty and full, and the bolt pattern of the mounting plate.
I *think* most senders are fairly standard in mounting, but definitely double check the bolt pattern to be sure.
There are a couple of "standard" resistance ranges, but as I recall, one has sort of gone out of faver, leaving the other as a de facto standard (240 ohm? Don't remember now.)
Bottom line: Do a bit of research; I think your options are more varied than you think.