Best Weed Eater fuel line?

I need to replace the fuel line on my old Feather Lute Plus trimmer and want the best I can find.



Tygon F-4040-A line lasts about 2 years and then turns hard even with ethanol free gas.

Tygon came out with LP1100 which is yellow like the F-4040-A but is supposed to be ethanol proof.

Now they have a new Tygon LP1200 that is almost clearer and supposed to be better than the LP1100 but no one seams to be selling it yet.