Rocket Candy Fuel - Common Alternatives to KNO3?

I'm sort of a model rocket enthusiast, but the most common fuel for model rockets, Rocket Candy, requires Potassium Nitrate as an oxidizer to oxidize Powdered Sugar. Potassium Nitrate is not necessarily expensive, but it's not very common, and the only process I found to make it at home took almost a year to produce product. I'm wondering if anyone has found another suitable oxidizer for the sugar, preferably not a nitrate unless it is one that is common, as I am not allowed to store nitric acid in my apartment to synthesize the nitrate. As a side note, I happen to have a significant amount of ammonium sulfate, and I am also wondering if this might be a viable substitute. I know that sulfates aren't always as good of oxidizers as nitrates, but I also know that ammonium salts tend to be better oxidizers. If anyone has some idea as to a common household compound that would be a suitable replacement for Potassium Nitrate as a fuel oxidizer, or if Ammonium Sulfate is good at oxidation, I ask you to help me out here.


Thanks for your consideration!
 ~ mpprogram6771




Here is one substitute, [per Wikipedia](https://en.wikipedia.org/wiki/Ammonium_perchlorate_composite_propellant):



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> Ammonium perchlorate composite propellant (APCP) is a modern fuel used in solid-propellant rocket vehicles. It differs from many traditional solid rocket propellants such as black powder or zinc-sulfur, not only in chemical composition and overall performance, but also by the nature of how it is processed. APCP is cast into shape, as opposed to powder pressing as with black powder. This provides manufacturing regularity and repeatability, which are necessary requirements for use in the aerospace industry.
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Here is [a source:](https://digitalcommons.unl.edu/cgi/viewcontent.cgi?referer=https://www.google.com/&httpsredir=1&article=1024&context=usnavyresearch) 'Perchlorate: Sources, Uses, and Occurrences in the Environment', detailing its possible creation:



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> A number of processes have been patented for the production of perchlorates. In general, sodium perchlorate is manufactured electrolytically using sodium chlorate as the feedstock. Potassium perchlorate and ammonium perchlorate are produced in a second step by reacting sodium chlorate as a water solution with other chemicals to create concentrated solutions of either potassium perchlorate or ammonium perchlorate, depending on the added chemical(s). Perchlorate crystals are then precipitated from the solution and are dried to produce a homogeneous dry granular product that is shipped in sacks and drums for sale to manufacturers of various perchlorate-containing end products.
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