For your first question, if it’s worth spending a little more money for a quality cover, my answer is yes. I think it’s always better to buy an item that’s a bit expensive than others as long as it is of top quality. As for your second concern, there are actually tons of shops out there that offer quality bike covers. I have tried buying a motorcycle cover waterproof item from this online seller, so maybe you could try searching the Internet too? But aside from shopping online, I think it’s also a good idea to gather suggestions from your relatives or friends. Either way, just make sure that the cover you’re buying has high standard features and really fits your bike.