I agree with the above. Nitro may be available from speed shops or racetracks - methanol too. There are a variety of sources for oil but it can be surprisingly expensive. One solution for nitromethane, if you are making low nitro fuel such as 5% or less is to buy a gallon of 40% fuel from your distributor. By mixing it with your blend, you can use it to make 8 gallons of low nitro (5%) hooch which is perfectly acceptable for most 2-stroke sport flying. For low nitro mixes, this is likely cheaper than sourcing the nitro separately.

Ross