If you are concerned about screw type clamps digging into fuel lines
hoses you can get screw hose clamps with a flat surface that don't
bite in.

Check your local FLAPS.

Subarus use something like this:
http://www.fuelfilters.biz/fuel_injection_hose_.htm

If you really want spring clamps, a specialty place like this may sell them
http://www.partssystems.com/shop/categorydetail.html?section_id=28

>I'm looking for the spring clamps for replacing my fuel lines in the engine
compartment.