I haven't bought that kind of fuel for a while, since most of my engines are ball bearing equipped and ABC types.

Fox sells fuel that would work well in that engine, of course, and there are probably others such as Sig, Red Max, Wildcat. What is important is to have at least 20% oil content (all castor would be fine) and at least 10% nitro methane.

If you order fuel from Red Max, you can tell them what you want and they will mix it for you. If you don't know for sure, tell them the engine it is for and they will steer you in the right direction.