Here's your needle valve. Your answer to finding the parts is right there in the attached diagram
Needle: 53-1200
https://www.ebay.com/itm/264253766176
Here's one of the gaskets
https://www.amazon.com/Toro-Gasket-Part-81-1010/dp/B00TD9GI96
Here's the float for the obsolete part number on the list (I'd check the float. They can crack and fill with fuel which will cause the bowl to overfill)
https://www.ereplacementparts.com/float-p-723238.html