You searched for "reciprocating fuel pump", this is where to find it:
Walbro Engine Management is the world's largest manufacturer of carburetors and a major manufacturer of ignition systems, fuel injection and air/fuel management components, and fuel storage and delivery components for engines targeted at outdoor power equipment, marine, recreational and two-wheel applications.
In 2007 Walbro Engine Management was purchased from TI Automotive by an affiliate of Sun Capital Partners, Inc. WEM continues to manufacture low pressure reciprocating fuel pumps for industrial and marine applications under the Walbro brand. TI Automotive (link to TI Auto page) manufactures fuel injection pumps solely for the automotive market, also under the Walbro brand name.