fuel filter and line help

[72shadetree]

my lines keep clogging up pulled sending unit and the filter on the unit is rotted and falling apart the tank looks clean.can you get the filter or do you have to get whole sending unit.
thought about using short piece of hose and clamp and in line filter on sending unit.or just put a good filter inline before pump.

im replacing all the lines from tank to carb.where the line comes from tank thru floor do i have to have the rubber line there or can i run all steel line.thanks