'03 HPDI Trim Sending unit

I Have an '03 150 HPDI, the arm on the trim sending unit broke (not the actuator). As far as I can tell this part is replacable, but I'm told I can only get it as a whole unit. Which is $100 for a 5 cent peice. Any help on where I could get one would be greatly appreciated

Thanks

[boats.net]

The trim sender 64E-83672-02-00 is only available as a unit.