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I would estimate between $600 to $1,000 US dlls. (possibly more) depending on how much of a hurry you are in and if your fuel tank is currently full. (of debris in addition to gasoline) Right now, there are lot of aftermarket (non-OEM quality) fuel pump/sending units out there in the $50 range. Be careful with those. I would insist on OEM quality because of the general inconvenience of re-replacing the pump/sender assembly if you get a poor quality unit and it fails prematurely.
Chum lee
P.S.: The fuel pump/sending unit you want is manufactured by Motorcraft #BU9Z-9H307A and costs over $300 on a good day. Figure about 4 hours labor (minimum) at your local going rate. ($125-$200/hr)