Fuel Managment

I have a 2004 Yamaha 300 HPDI want too install a fuel managment gauge and system anyone know where i could get the set for the best price?

[boats.net]

6Y5-W0088-53-00 Single engine Fuel management kit.
Fuel Management Gauge kit

is there on that is maybe cheaper something that is maybe not made by yamaha?

[boats.net]

Flo Scan has one but I don't have prices for it.