i dont know if u can buy the pump or the filter seperately or not. i bought a single piece which had them both. i my have the pix somewhere in my pc, i ll look for them. u CAN seperate the two but their configuration is such that they fit into one single assembly that is lowered into the fuel tank.
another thing to consider when replacing anything in the fuel delivery system is that u gotta check all of the things. if the filter is clogged but the pump is fine, the pump wud die off soon as it wud be taking extra strain. if the injectors are clogged, pump faces the same fate n if the injectors n pump r fine n filter is clogged, the pump wud break off small particles of dust form the filter n send it down to the injectors, blocking them too.
so, whenever the work is done, all things, including fuel lines, should be checked.