Are you looking for engine or mower parts?
Most Scotts mowers were made by Murray, but some were made by John deer. this is where you will find mower parts
If you are looking for engine parts any small engine shop that services your engine brand should be able to help
Is this a wheel with plastic teeth molded into it? If so could you get me a count of the number of teeth on the wheel and a number of teeth on the drive gear.
I will keep looking for you. Scotts mowers are hard to track down until we figure out who manufactured the mower originally.
Future parts are going to be difficult. You will be able to find engine parts without a problem. Mower parts will be harder and may take some looking.
I have an answer to your wheel question. Stens (an after market company) makes several wheels that should fit your mower. you can go to www.stens.com and order them directly from them. The wheel they have is 8 inches in diameter with a 1/2 inch hole and 53 teeth. They actually have different colors to match the mower. The black one is the least expensive. Part number is XXXXX and will cost you $22.47 You can take a look at it on the web site and see if it will work for you. This wheel is listed under Murray and AYP (both of who have made Noma mowers) I think you will be fine with this wheel as long as the measurements are the same.
Good luck, I hope this helps you out.