i want two guages nitrous + fuel but because of tubing i they cost like 250 dollars!!!!!!! i can't find cheaper gauges any help

The Fuel guage is expensive becuase it's an elcetronic guage. That way you arn't running fuel into the drivers compartment. It's worth it.

you can get an engine bay mounted fuel gauge from B&M for around $40.

Just my $.02 but for $250 you'd be much better served by a wide band O2. That would tell you if you are having fuel issues and much much more.