As the title says, I have a Walbro GSS340 High Pressure Fuel Pump for sale. It is new, and unused. I only have the pump, you will need to pick up the applicable wiring harness / pigtail and filter sock on your own. As seen here:

http://www.lingenfelter.com/mm5/merc...Store_Code=LPE

Asking $70 shipped.