FWIW I got rid of the stock 410 chain that came with my GT-5 66cc. after seeing how twisted it was. Because I am running a 3" wide tire and chain clearance was an issue I tried the KMC 415HD that Pirate sells. Much better quality and still narrow enough to give me the needed clearance. Be sure to get the HD chain, it is a "roller" type and better than a standard bushing type bike chain. #41 is stronger and the best to use if you can however.
Your price was retail and entirely fair. $40 is a drop in the bucket in the big picture. I have yet to wear out one of these chains. Some people will claim chain stretch and it is possible even with a good chain. What I see more of is sprockets that are not cut correct so once the sprocket (aluminum sprockets to be clear) wears in to the chain and the chain sits deeper in the sprocket teeth, you'll have to readjust. People may be skeptical of this claim but I have tried to wrap a chain around lots of sprockets. If you can't get a full wrap with FULL engagement then the sprocket is not cut at a true 1/2" link pitch.
turned out there was an industrial supply store a mile from my house. I passed there a thousand times. I even ran through their yard in an ice storm. but I never put 2 and 2 together. i think they will be a good source for bearings and other things as well.
i'll keep ya posted