I've fitted an adapter that takes two lines at the same time (see picture) but I have the original line feed unit (not used much). I'll throw in some extra lines and a couple of brush cutting blades (but they will need sharpening). I also have the original harness.
This item is in the category "Garden & Patio\Garden Power Tools & Equipment\Strimmers". The seller is "mickeyj38" and is located in this country: GB. This item can be shipped to United Kingdom.