2002 Ford Focus 1.6 Ford Focus zetec 02 plate

Engine Mechanical problem
2002 Ford Focus Two Wheel Drive Manual

it is described by the garage as having a little end broken connection crankshaft to piston - would buying this part be a replacement or would I need something else

Ford focus 1.6 crankshaft assembly 2007 16v crank shaft in good used condition.only covered 4,400 miles. Complete with shells.

Also could you let me know how big a job I might be looking at and if to replace a larger piece of the engine (cylinder head?) with a scrap part would be easier could you let me know what i would need to get

I look forward to your response and would greatly appreciate any help you can give.

I will attach a picture of the proposed part for information