You can find bicycle pump repair parts at local bike shops, online retailers, and specialty cycling stores.
There's no set "recipe" for the sizeof the parts of a bicycle pump, other than that they have to fit together. A floor pump might have a 2" piston while a road bicycle hand pump might be 3/4" or smaller.
A big component of hydraulic pump repair is replacing worn out or damaged parts. If you can get aftermarket parts, that would significantly reduce the cost of your hydraulic pump repair.
A bicycle puncture repair kit typically includes tire levers, a patch kit, a pump or CO2 inflator, and a multitool for making adjustments.
Bicycle pumps are most commonly found and sold at a bicycle store. One may also find a bicycle pump at a local retailer such as Walmart or Target, or online at Amazon.
A bicycle tire repair kit typically includes tire levers, a patch kit, a spare inner tube, a hand pump or CO2 inflator, and a multitool for making adjustments.
A tube repair kit for fixing punctures on bicycle tires typically includes items such as patches, adhesive, sandpaper, tire levers, and a portable pump.
In a Chilton's repair manual for that vehicle. You can find them in a well stocked auto parts store.
You can find a reliable bike pump frame mount for your bicycle at most bike shops, online retailers like Amazon or REI, or directly from the manufacturer of your bike pump. Look for mounts that are durable, easy to install, and compatible with your specific pump model.
You can pump it with a bicycle pump with the needle.
Harris Air Systems in Salt Lake City, UT sells parts and repairs heating pumps. You can find out more at http://www.harrisairsystems.com/air-handlers.php.
You can't fix the pump, only replace it. It is located in the fuel tank. I know of no online repair manual. Go to any Auto Parts store and purchase a Hayne's or Chilton's repair manual. Around $15
A bicycle tire tube repair kit typically includes items such as tire levers, patches, glue, and a pump or CO2 inflator for fixing a punctured tire while on the go.