Have a 94 F150 4.9 L truck (110k mi.) with factory A/C and P/S. This truck is equipped with an OEM (EPA required) smog/air emissions pump that is known to sometimes fail due to age/wear. My EPA required smog/air pump seems to be okay for now, but as I understand reliable replacement/rebuilt smog/air pumps (EPA required) can be hard to locate for this particular application. Can any members provide recommendations/guidance on procuring a spare EPA required smog/air pump?