Where are you?
In the states, Nitro can be found at any fuel supplier for drag racers, though it's often 90% or less.
But like the other guy said, just buy it ready to go from the local hobby shop.
I would not advise breaking in on no nitro. It might not get up to the same combustion temps and do more harm than good.
Sean. Certified speed crazed mowron.
Team Shepherd USA