Here in the Philippines, Shopee and Lazada are more popular and usually much less expensive than Amazon. While browsing, I ran across a cylinder kit for my Skygo 150 King. The cycle is just past it's 10,000Km checkup and is running fine. However, if I own it long enough it will need a cylinder and this one was about 60% off. ($26 delivered) It's not perishable and if for some reason I never need it, it fits enough common models I'm sure I can recapture my cost.