Thought some more on this. Have similar issue(s) to what you have. Most everything I need/needed for my bike over the years has had to come from outside Canada at a premium, including what I have needed for this engine rebuild. Not a lot of choice where I live. If you are inclined to look for a replacement engine, there is no harm in taking the engine out of your bike and taking it apart. Do this as if you were intending to do work and reinstall. May be pleasantly surprised at the engine condition, what is needed to fix, and the cost of the necessary work. Winter's coming and it would be a good project. Would do this first before jumping into another unknown. Just a thought.