Well technically all our cars have coil springs over shocks....what coil overs has come to mean I think (in most countries) is to have threaded sleeves to adjust the height of each corner of the car independently.

The alteration of height effects the weight transferred to each wheel during cornering and braking.

So I believe he wants to buy a fully completed strut, including spring and shock with adjustable height platforms on them....I think.

Daveman would surely be able to help him out.