A jug can be honed (use a ball hone) but only to break the glaze on the cylinder. If it is scored badly, its not repairable. I looked into boring them out a bit, and getting a bigger ring, but there is a special coating (chrome or some other type) I guess if you knew someone who could re chrome the cylinder, you could try it, but its probably expensive. Did you try and look up a new jug on that site?
Most the shops here, also sell new equipment, and one also sells and services heavy equipment. They are doing quite well. I bet most of those shops would do way better, if they actually learned how to fix the equipment. Ex: Alot of engines that I have worked on, had leaking seals, or loose bolts. I was told they were junk and would never run. And of course the $150 line. I think the most I have put into an engine to get it running, was a $12 seal from a bearing supply company. It took me about 45 mins to fix.
A new saw or trimmer is pretty cheap. I have been tempted to start up my own little side business, but dont have a shop to do it, or the spare time right now. I bet after a year in business, I could take a huge chunk of their business, just with better people skills and a will to service or repair something. The ones here shouldnt be called repair shops. They dont really repair much.