I'm not sure if there are any modular poles on the market sold at that length. An SL2 would probably manage it with some extra sections but with no guarantees from the manufacturer. There are some ionics poles at that length and also cf xtel near that length. I think the xtreme would be the pole to go for, when extended over 55ft it is essentially used as a modular, but before that its an extending pole. It's also incredibly light and rigid.
Simon.