I got a quoted from suzuki £460 But i've found one cheaper here http://www.cheapcycleparts.com/products/538878-suzuki-11210-01c11-0f0-hard-parts-cylinder Or i could keep looking on ebay for a good one? How much am i looking for a second hand one for? Surly its best to get a new one?

I'll have a word with my builder about the rust stains or see if he can see a steel freeze plug when he fully strips the engine Thanks again